2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences

2021 VIRTUAL ACCELERATED BRIDGE CONSTRUCTION CONFERENCE: WITH EMPHASIS ON INTERNATIONAL EXPERIENCES Virtual Conference: December 8-10, 2021 Virtual/Hybrid UHPC Workshops: December 9-10, 2021 https://abc-utc.fiu.edu/conference/

DECEMBER, 8-10, 2021 Miami, Florida, U.S.A.

M ES SAG E FR OM THE CONFERENC E CHA I R A ND CO- CHAIR

Approximately 23% of the U.S. bridge inventory is substandard and in

is an excellent place to meet and network with those who have used ABC

need of retrofit or replacement. At the same time, in both rural and major

worldwide, exchange information and get feedback on your next ABC

urban areas, we cannot continue business as usual using old construction

project. The 2021 Conference, December 8-10, is the fifth in a series of ABC

practices to retrofit, replace or build new bridges. The public is demanding

conferences organized by the ABC-UTC at Florida International University

that safety is provided while traffic interruptions are significantly reduced.

(FIU). The 2021 Conference will also include complementary topics with

Construction sites are magnets for accidents. A reduction in the number

direct impact on the widespread use of ABC — namely, automation and

of onsite construction days translates to higher levels of safety and fewer

robotics in construction, design of bridges for service life and Ultra-High

fatalities, injuries and economical losses. A single fatality is heartbreaking

Performance Concrete (UHPC). The 2021 conference includes 18 keynote

and can cost society millions of dollars. When there is technology that

presentations and 30 technical presentations. Two key Congressmen,

can prevent construction-related fatalities, then it must be used. States

involved in Transportation committees in the U.S. Congress, will address

are moving toward adopting Accelerated Bridge Construction (ABC) at the

the attendees on the latest opportunities, thinking, strategies and plans

programmatic level within their agencies. The use of ABC has increased

for bridge engineering in the U.S. To allow attendees to listen to every

exponentially, and new knowledge is continually being developed. Yet, more

presentation, the conference is structured such that there will be only one

work needs to be carried out. It is essential that the bridge community

presentation at a time. The presentations include numerous topics related

keep track of these developments and new advances. The international

to the use of ABC in the field. On Thursday and Friday evenings, December

community is also moving fast to adopt ABC.

9 and 10, an innovative hybrid virtual workshop will provide attendees with a full spectrum of knowledge, needed to develop their own UHPC mix that

The 2021 Virtual Accelerated Bridge Construction Conference: With

will be significantly less expensive than the proprietary versions of UHPC

Emphasis on International Experiences, provides the best forum for bridge

currently available. This workshop will also include speakers representing

professionals to learn the latest ABC technologies being developed outside

other academic institutions that, in recent years, have developed non-

the U.S., to gather knowledge from these international experiences and to

proprietary UHPC. One of the highlights of the UHPC workshop is a panel

understand how to put them into use. At the same time, the conference

discussion consisting of state bridge engineers, consultants and academia,

provides excellent opportunities for bridge professionals around the world

providing a summary of their experiences and recommendations on the use

to learn the latest developments in ABC in the U.S. The 2021 Conference

of UHPC in bridge design and construction. Don’t miss the opportunity to

2 | MESSAGE FROM THE CONFERENCE CHAIR AND CO-CHAIR

Atorod Azizinamini, PhD, PE learn everything necessary to develop your own UHPC mix design.

The first four National ABC Conferences were held in December of 2014 2015, 2017 and 2019. Each attracted more than 700 bridge professionals, and at each conference, more than 50 exhibitors showed their products and services. We expect an even larger

CONFERENCE CHAIR Vasant Surti Professor of Civil Engineering Director, Accelerated Bridge Construction University Transportation Center (ABC-UTC) Director, Moss School of Construction, Infrastructure and Sustainability College of Engineering and Computing Florida International University

audience to attend the 2021 conference as we go virtual with a significant international presence.

As promised, our 2022 ABC Conference will be held face-to-face on December 7-9 in Miami, Florida. Bridge professionals from the U.S. and outside the U.S. are encouraged to submit abstracts, which will be used to develop the 2022 ABC Conference program.

The Conference Planning Committee will include the same 31 State Departments of Transportation that have co-sponsored this year’s (2021) Virtual ABC Conference. The deadline for submitting abstracts for the 2022 ABC Conference is February 25, 2022.

Mary Lou Ralls Newman, PE CONFERENCE CO-CHAIR Director of Technology Transfer Principal, Ralls Newman LLC

We look forward to seeing you virtually on December 8-10, 2021 and face-to-face in Miami, Florida on December 7-9, 2022.

2021 Virtual Accele rated Bridge Construction Conference: With Emphasis on International Experiences | 3

TABLE OF

CONTENTS

06 Who Should Attend The Conference?

06 Conference Planning Committee 07 Conference Organizing Committee 07 Continuing Education 08 Co-Sponsors 09 International Co-Sponsors

4 | TABLE OF CONTENTS

09 Sponsor & Organizer

24 Conference Schedule

10 Exhibitors

26 Main Agenda

10 Sponsorships

32 Presentation Descriptions

12 Call For Awards

56 Workshop Agenda

16 Award Committee Members

60 Call For Abstracts

17 Featured Keynote Speakers 19 Featuring Keynote Talks

2022 Accelerated Bridge Construction Conference

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 5

WHO SHOULD ATTEND THE CONFERENCE?

CONFERENCE PLANNING COMMITTEE

Bridge design engineers; consultants; fabricators; erectors; precasters;

Alabama Dept. of Transportation - Paul Froede Alaska Dept. of Transportation and Public Facilities - Richard Pratt Arizona Dept. of Transportation - David Benton Colorado Dept. of Transportation - Stephen James Harelson Connecticut Dept. of Transportation - Timothy Fields Delaware Dept. of Transportation - Jason Hastings Florida Dept. of Transportation - Robert Robertson Georgia Dept. of Transportation - Bill DuVall Illinois Dept. of Transportation - Carl Puzey Indiana Dept. of Transportation - Jeremy Hunter Iowa Dept. of Transportation - Ahmad Abu-Hawash Louisiana Dept. of Transportation and Development - Hamed Babaizadeh Maine Dept. of Transportation - Wayne Frankhauser Jr. Michigan Dept. of Transportation - Bradley Wagner Minnesota Dept. of Transportation - Nancy Daubenberger Mississippi Dept. of Transportation - Scott Westerfield Missouri Dept. of Transportation - Dennis Heckman Nebraska Dept. of Transportation - Mark Traynowicz Nevada Dept. of Transportation - Jessen Mortensen Oklahoma Dept. of Transportation - Steven Jacobi Oregon Dept. of Transportation - Bruce V. Johnson Pennsylvania Dept. of Transportation - Thomas P. Macioce Tennessee Dept. of Transportation - Ted Kniazewycz Texas Dept. of Transportation - Graham Bettis Utah Dept. of Transportation - Carmen Swanwick Vermont Agency of Transportation - Kristin Higgins Washington State Dept. of Transportation - Bijan Khaleghi West Virginia Dept. of Transportation - Ahmed Ndatiri Mongi Wisconsin Dept. of Transportation - William Oliva Wyoming Dept. of Transportation - Michael Menghini Federal Highway Administration - Romeo Garcia

construction professionals; maintenance engineers; transportation officials; policy makers; marketing professionals; International bridge professionals, U.S. federal, state and local agencies; city, county, and regional officials; industry suppliers; academicians; and bridge professionals with any aspect of bridge design, construction, or maintenance.

The focus of the conference will be on international experiences in the fields affecting accelerated bridge construction in general, including international case studies and projects; prefabricated bridge elements, systems, and technologies; use of advanced materials such as Ultra-HighPerformance materials, innovative construction methods and techniques; policies; contracting methods; and marketing strategies that will facilitate the accelerated construction of bridges. ABC projects successfully completed outside the U.S. will be presented. The 2021 conference will be different from previous conferences in that it: a) is fully virtual and b) focuses on international experiences.

6 | ABOUT THE CONFERENCE

CONFERENCE ORGANIZING COMMITTEE Atorod Azizinamini, Ph.D., PE Mary Lou Ralls Newman, PE Mina Saremi, M.B.A. Rachel Jenkins, M.B.A. Armin Mehrabi, Ph.D., PE David Garber, Ph.D., PE Islam Mantawy, Ph.D., PE Carlton Ng, M.S.

CONTINUING EDUCATION Participants will be presented with a certificate of attendance for conference and/or workshop hours they participate in. It will be the attendee’s responsibility to present this certificate to his/her board of professional engineers for use in fulfilling continuing education requirements. The conference organizers are responsible only for issuing the conference certificate. Florida International University is an approved sponsor of continuing education for professional engineers in Florida and New York State.

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 7

CO-SPONSORS Thank you to the State Departments of Transportation and non-profit and bridge-

Federal Highway Administration (FHWA)

related organizations and agencies that are co-sponsoring the 2021 Virtual ABC

Transportation Research Board (TRB)

Conference. Our current list of Conference Co-Sponsors includes:

Alabama Dept. of Transportation Alaska DOT&PF Arizona Dept. of Transportation California Dept. of Transportation Colorado Dept. of Transportation Connecticut Dept. of Transportation Delaware Dept. of Transportation Florida Dept. of Transportation Georgia Dept. of Transportation Illinois Dept. of Transportation Indiana Dept. of Transportation Iowa Dept. of Transportation Louisiana Dept. of Transp. & Dev. Maine Dept. of Transportation Michigan Dept. of Transportation Missouri Dept. of Transportation Minnesota Dept. of Transportation Mississippi Dept. of Transportation Nebraska Dept. of Transportation Nevada Dept. of Transportation Oklahoma Dept. of Transportation Oregon Dept. of Transportation Pennsylvania Dept. of Transportation Tennessee Dept. of Transportation Texas Dept. of Transportation Utah Dept. of Transportation Vermont Agency of Transportation Washington State DOT West Virginia Dept. of Transportation Wisconsin Dept. of Transportation Wyoming Dept. of Transportation

8 | Sponsors

INTERNATIONAL CO-SPONSORS

iabse.org To become a co-sponsor, please contact Atorod Azizinamini: aazizina@fiu.edu 402-770-6210

SPONSOR & ORGANIZER Accelerated Bridge Construction University Transportation Center (ABC-UTC) Florida International University Civil and Environmental Engineering Department

abc-utc.fiu.edu

For detail information about the conference, please visit https://abc-utc.fiu.edu/conference/ 2021 Conference Program

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 9

EXHIBITORS

FINANCIAL SPONSORSHIP

Dedicated times, as indicated in

The 2021 ABC Conference offers an

the conference program, will allow

extraordinary opportunity for companies

exhibitors to brief the attendees on

to promote their projects, products and

their products and services. Thanks

services, and to expand their network

to the following exhibitor, that

since it brings together Department of

upon publication of this program is

Transportation bridge engineers, design

supporting the 2021 International

professionals, fabricators, contractors,

Accelerated Bridge Construction

academicians and representatives of

Conference, by exhibiting.

federal and local public agencies, including

•Structural Technologies

international bridge professionals.

Thanks to the following sponsor, that upon publication of this program is supporting the 2021 International Accelerated Bridge

If you are interested in exhibiting at the conference, please contact Mrs. Saremi at msare001@fiu.edu or call 954-895-7728.

Construction Conference, by sponsoring.

PLATINUM SPONSOR Kwik Bond Polymers

Exhibitors from the U.S. and abroad are encouraged to have a virtual exhibit at the conference. Dedicated times are allocated to showcase your products and information.

10 | EXHIBITORS AND FINANCIAL SPONSORSHIP

If you are interested in sponsoring the 2021 conference, please contact Mrs. Saremi at msare001@fiu.edu or call 954-895-7728.

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 11

CALL FOR

AWARDS

Deadline: October 20, 2021

12 | CALL FOR AWARDS

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 13

2 0 2 1 I NT E RNATI ONA L A B C CO NF ERENC E AWAR DS CA LL FOR NOM I N ATIONS

The conference organizing committee is continuing the tradition of recognizing excellence in accelerated bridge construction by seeking nominations for the Most Influential International Person, Best International ABC Projects (by category) and ABC Innovative Equipment Awards.

The awards program provides an opportunity to showcase innovative achievements and projects and to recognize talented individuals that advance ABC at the international level.

14 | CALL FOR AWARDS

AWARD CATEGORIES

ELIGIBILITY

All awards will be given to individuals, projects and equipment outside

A. Most Influential International ABC Person of the Year Outside U.S.

the U.S. Awards will be given virtually during the 2021 conference, and

i. Demonstrates leadership in ABC

winners will also be recognized in person if they attend the 2022 ABC

ii. Champions the ABC culture

conference, to be held in Miami, Florida, December 7-9, 2022. The 2021

iii. Has actively been promoting ABC

ABC conference international awards are listed below:

iv. Promotes technology amongst peers and stakeholders.

1. Most Influential International ABC Person of the Year Outside U.S.

B Most Innovative ABC Equipment Developed Outside U.S. i. Speeds project delivery

2. Most Innovative ABC Equipment Developed Outside U.S. 3. Best International ABC Projects Constructed Outside U.S., in the following categories: a. Long-Span Bridge b. Medium-Span Bridge c. Short-Span Bridge d. Rail Bridge e. Pedestrian Bridge

ii. Used on one or more bridge projects that were opened to

traffic between October 1, 2018 and September 30, 2020

C. Best International ABC Projects Constructed Outside U.S. i. Eligible bridges must have been constructed or completed

and opened to traffic between October 1, 2018 and September 30, 2020 ii. A bridge is defined as a structure, including supports,

erected over a depression or an obstruction, such as water, a

highway, or a railway, having a track or passageway for carrying

traffic or other moving loads, and having an opening measured

along the center of the roadway of more than 20 feet (6 meters)

between supports

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 15

AWARD COMMITTEE MEMBERS The following Award Committee members are serving as judges:

AHMAD ABU-HAWASH

NANCY DAUBENBERGER

SAM FALLAHA

COMMITTEE CHAIR,

MINNESOTA DEPARTMENT

FLORIDA DEPARTMENT

IOWA DEPARTMENT OF TRANSPORTATION

OF TRANSPORTATION

OF TRANSPORTATION

ROMEO GARCIA

CHERYL HERSH SIMMONS

BIJAN KHALEGHI

U.S. FEDERAL

UTAH DEPARTMENT

WASHINGTON STATE DEPARTMENT

HIGHWAY ADMINISTRATION

OF TRANSPORTATION

OF TRANSPORTATION

16 | CALL FOR AWARDS

FEATURED KEYNOTE SPEAKERS

CONGRESSMAN MARIO DIAZ-BALART (FL-25)

CONGRESSMAN CARLOS A. GIMENEZ (FL-26)

Ranking Member of the House Appropriations

Highways and Transit Subcommittee, Florida, USA

Subcommittee on Transportation, Florida, USA

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 17

FEATURED KEYNOTE SPEAKERS

CONTINUATION

CARMEN SWANWICK, SE

FIRAS SHEIKH IBRAHIM, PH.D., PE

Chair, AASHTO COBS and Utah Department of

Office of the Assistant Secretary for Research

Transportation, Utah, USA

and Technology (OST-R), U.S. Department of Transportation, Washington, D.C., USA

Carmen Swanwick is chair of AASHTO COBS. She is the Utah Department of Transportation (UDOT) Project Development Deputy Director and Director of Construction,

Dr. Firas Ibrahim is the director of the U.S. DOT’s Office of Research, Development, and Technology. In this role, he

served as the Department’s Chief Structural Engineer for almost

provides leadership to ensure that RD&T programs and activities

ten years and has over 15 years of experience as a consultant

across the Department and University Transportation Centers

in structural engineering within the transportation industry. She

advance the Department’s goals and priorities, and that research is

received both her bachelor’s and master’s degrees from the

of the highest quality. Dr. Ibrahim was previously the Federal Highway

University of Utah in civil/structural engineering. Ms. Swanwick

Administration’s Lead Manager for Stewardship & Oversight. In that

is the AASHTO Committee on Bridges and Structures chair and

role, he provided stewardship and oversight leadership to ensure the

for the previous six years served as the AASHTO Committee on

successful delivery of the $44 Billion Federal-aid highway program

Bridges and Structures (COBS) T-4 Committee on Construction

annually, and the alignment of enterprise activities and resources

chair. She participates in numerous National Cooperative

with priorities. He served in various leadership positions within

Highway Research Program (NCHRP) projects and Transportation

FHWA. Dr. Ibrahim served as the Surface Transportation Team Leader

Research Board (TRB) Committees. Carmen has been involved in

at the United States Embassy in Kabul, and Transportation Counselor

several Department initiatives through the years, including the

and Attaché at the United States Embassy in Baghdad. He also

Accelerated Bridge Construction (ABC) program, development of

held positions in academia and the private sector. Dr. Ibrahim holds

the Unmanned Aerial Systems (UAS) program and, recently, the

Doctor of Philosophy, Master of Science, and Bachelor of Science

Digital Delivery effort with an emphasis on Building Information

degrees in civil engineering. He is a licensed professional engineer in

Modeling (BIM) for bridges and structures.

the State of Pennsylvania.

18 | FEATURED KEYNOTE SPEAKERS

FEATURING KEYNOTE TALKS BY: UHPC Field Applications in Switzerland

Composite Bridges with Prefabricated Deck Elements

Laurent Boiron

Peter Collin, Ph.D.

Managing Director Europe at UHPC Solutions, Schlieren, Switzerland

Professor in Composite Structures, Luleå University of Technology, Sweden

Mr. Laurent Boiron is a civil engineer and presently the European

Dr. Peter Collin received his Ph.D. from Luleå University of

managing director of UHPC Solutions, a company specialized in

Technology (LTU) in 1992 specializing on the stability of steel

UHPC production, placement and technical consulting. He worked

frames. He has since been working with design and development

previously at Lafarge-Holcim where he developed the UHPC

of steel- and composite bridges, including bridges with deck

market in Switzerland. Mr. Boiron has been managing projects

elements and integral abutments. This includes I-girder and box

and developing UHPC Solutions in Europe since 2019. With

girder bridges for road, railway and pedestrian traffic. During

experience in more than 160 UHPC projects, he is consulted as a technical expert

1993-1994, he worked with the Öresund Bridge between Sweden and Denmark,

and part of the UHPC Swiss standard committee.

writing project codes based on Eurocode 3 (Steel Structures) and 4 (Composite Structures). He has taught the industry on design using Eurocodes, which were introduced in Sweden in 2010. In 2007, Collin was appointed professor in Composite

UHPC Bridge Deck Overlays and Beyond

Structures at LTU. He also works with steel/composite bridges at Ramböll, a

Eugen Brühwiler, Prof. Ph.D., PE

consulting company with 10,000 employees.

Swiss Federal Institute of Technology (EPFL) Lausanne, Switzerland Dr. Eugen Brühwiler is a professor of structural engineering at EPFL – the Swiss Federal Institute of Technology in Lausanne, Switzerland. His teaching and research activities include modern methods of fatigue and safety assessment of existing bridges

Development of ABC Resources for Implementation of ABC in the United States

Michael P. Culmo, PE Clough Harbour and Associates, LLP, Connecticut, USA

using data from monitoring as well as the use of UHPC for the

Mike Culmo is a bridge engineer with over 37 years of experience in

rehabilitation and strengthening of bridges. As a consulting

the design of steel, concrete, prestressed concrete and timber

engineer, he is involved in numerous UHPC projects, mostly related to bridges and

bridges. He has special expertise in the field of accelerated bridge

buildings in Switzerland and abroad.

construction technologies and constructability engineering. He is the principal author of numerous publications in the field of ABC, including the 2018 AASHTO LRFD Guide Specifications for Accelerated Bridge Construction. He is a licensed professional engineer.

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 19

NCHRP Solving Transportation Challenges Through Research

UHPC: Bridge Design with UHPC and A Path Forward

Waseem Dekelbab, Ph.D., PE, PMP

Benjamin A. Graybeal, Ph.D., PE

Senior Program Officer, National Cooperative Highway Research Program (NCHRP),

Structural Engineer, Office of Infrastructure Research Federal Highway Administration

Washington, D.C., USA

(FHWA), Virginia, USA

Dr. Waseem Dekelbab joined TRB as a senior program officer in

Dr. Ben Graybeal is the team leader for Bridge Engineering

November of 2008, and primarily manages NCHRP bridge-related

Research in the FHWA Office of Infrastructure Research. He also

research projects. Before joining NCHRP, Dr. Dekelbab worked

leads FHWA’s structural concrete research efforts. His expertise

on-site at the Turner-Fairbank Highway Research Center as

includes bridge engineering, structural concrete, concrete

principal investigator of the Bridge Management Information

materials and forensic investigations. He has a wealth of

Systems (BMIS) laboratory supporting the Long-Term Bridge

experience with UHPC, having been a leader in the UHPC

Performance (LTBP) Program while employed by Science Applications International

community since FHWA began focusing on this topic in 2001. He is the chair of the

Corporation (SAIC) under contract with the FHWA. Dr. Dekelbab assisted in developing

American Concrete Institute Technical Committee on UHPC and is the co-chair of the

NCHRP Report 495 and other DOT projects that address bridge truck loadings,

International Interactive Symposium on UHPC conference series most recently

deterioration, and cost, including early-age deck cracking, concrete fatigue, and steel

delivered in June of 2019. He is leading the ongoing effort to develop UHPC structural

member fatigue. He has led many consulting forensic projects using Finite Element

design guidance as a supplement to the AASHTO LRFD Bridge Design Specification.

(FE) analysis and is a co-author of several bridge research reports and papers published by TRB, USDOT, ASCE, and ACI. Dr. Dekelbab taught structural design at the University of Maryland-Eastern Shore. He also received a certificate of training for “Safety Inspection of In-Service Bridges” from the FHWA’s National Highway Institute and he is a certified Project Management Professional—PMP®. Dr. Dekelbab holds a Bachelor of Science degree in structural engineering from Damascus University in Damascus, Syria, and M.S. and Ph.D. degrees in structural and bridge engineering from

Caltrans Accelerated Bridge Construction Manual

Dorie E. Mellon, PE Senior Bridge Engineer – Accelerated Bridge Construction, Office of Structure Quality Management, Structure Policy & Innovation, Division of Engineering Services, Caltrans, California, USA

Wayne State University in Detroit, Michigan. Dr. Dekelbab is a registered professional

Dorie Mellon is a senior bridge engineer and Accelerated Bridge

engineer (PE) in Michigan, New York, and Virginia.

Construction (ABC) specialist in the Division of Engineering Services (Structures) at Caltrans. Since 1986, Ms. Mellon has worked in the areas of bridge design, construction, seismic research, cost estimating, constructability review and the implementation of innovative methods and technologies to improve transportation project delivery in California. Over the last 10 years her focus has been mainstreaming ABC in California through research deployment, outreach, development of planning tools, and the standardization of design and construction policy and practice. Ms. Mellon serves as the Caltrans ABC Technical Committee Chair and is a primary author of

20 | FEATURED KEYNOTE TALKS

the 2021 Caltrans ABC Manual. She was a member of the NCHRP Project Panel 12-98

Acceleration Versus Beauty? – The Role of Prefabrication in Bridge Construction

“Guidelines for Tolerances for Prefabricated Bridge Elements and Calculating Dynamic

Mike Schlaich, Ph.D.

Effects in Large-Scale Bridge Moves” and is the recipient of the 2017 Professional

Professor at Technische Universität Berlin, Chair of Conceptual

Engineers in California Achievement Award and 2021 James E. Roberts Award for

and Structural Design, Berlin, Germany

Outstanding Engineering and Management in Transportation.

Dr. Mike Schlaich is one of the managing directors of Schlaich Bergermann Partner (SBP), professor of Conceptual and Structural Design at the Technische Universität Berlin and certified German

Jay Holombo, PE

proof checking engineer. His executed projects range from signature

T.Y. Lin International, California, USA

bridges and long-span roofs to stadia, office and high-rise buildings

Jay Holombo is a principal engineer with T.Y. Lin International. He has over 30 years of bridge engineering experience, and he has Bachelor of Science in civil engineering and a Ph.D. in structural engineering from the University of California, San Diego.

and other exceptional structures. Dr. Schlaich’s research work includes extradosed bridges, bending and fatigue of strands for bridge cables, carbon fiber tension elements, movable and adaptive structures, as well as the use of new materials such as carbon and infra-lightweight concrete. He is a member of the BerlinBrandenburg Academy of Sciences and Humanities and a gold medalist of IStructE.

Building Information Modeling (BIM) for Transportation Infrastructure: ABC Trends and Practices in Seismic Regions

the future of project delivery and asset management

Bijan Khaleghi, Ph.D., PE, SE

Tristan McDonnell

State Bridge & Structures Design Engineer, Washington State Department of

Arup, London

Transportation, Washington, USA

Tristan McDonnell is a civil engineer and director at Arup in London

Dr. Bijan Khaleghi is the State Bridge Design Engineer with the

where he leads the Civil Engineering group, delivering designs on

Washington State Department of Transportation (WSDOT) Bridge

significant development projects across the globe. Mr. McDonnell

and Structures Office, and an adjunct professor at Saint Martin’s

is an elected member of BuildingSMART’s InfraRoom Steering

University. He is a member of AASHTO Technical Committees on

Committee and in this capacity he is actively supporting bSI’s drive

Movable Bridges T-8, Concrete Bridges T-10, Tunnels T-20,

to digitally transform the built asset industry, with an emphasis on

WRA-PIARC, TRB committees on ABC, Concrete, and Tunnels. He is

the infrastructure sector.

also a member of American Segmental Bridge Institute, Precast/Prestressed Concrete Institute, and National ABC Center at FIU. Dr. Khaleghi is the recipient of PCI Robert J. Lyman award, October 2018; PCI Fellow Award, February 2018; ASCE T.Y. Lin Award, March 2014; Charles C. Zollman Award, PCI Journal 2011 and 2013; ASCE SEI T.Y. Lin Award, May 2006; and the Martin P. Korn Award, PCI Journal Award 2005.

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 21

Joost Schlebaum

Bridge Systems and Accelerated Bridge Construction Applications

Arup, Amsterdam

in the Chinese High-Speed Rail Network, Joost Schlebaum is a BIM manager at Arup in Amsterdam, where he leads the infrastructure BIM team. Mr. Schlebaum has worked on a

Gongyi Xu, Ph.D. Wuhan, China

variety of national and international BIM projects and is influencing

Dr. Xu is one of the top bridge engineers in China. He has made

cutting edge BIM and digital developments.

significant contributions in long span bridges for high-speed railways, suspension bridges with multiple towers and double decks. He has designed more than 30 suspension bridges and 20 cable-stayed bridges. He is the lead designer for the 1700m

ABC-US Experience from Consultant Viewpoint and Opportunities

main-span Yangsigang Yangtze River Bridge, the 1092m main-span

Bala Sivakumar, PE

Wufengshan Yangtze River Bridge, and the 938m main-span Qingshan Yangtze River

Vice President, Bridge Line of Business Director, East Region,

Bridge. Dr. Xu has been awarded: International Medal (2018), Institution of Civil

T.Y. Lin International, New York, USA

Engineers, UK; George Richardson Medal (2020), IBC, USA; John Roebling Medal

Bala Sivakumar has more than 38 years of national bridge

(2018), IBC, USA.

engineering experience and is an expert practitioner in Accelerated Bridge Construction (ABC). He has served as the lead designer of ABC projects in several states. He served as the co-principal investigator on the SHRP2 R04 Project entitled Innovative Bridge Designs for Rapid Renewal, which includes national ABC standards, guidelines for design drawings, guidelines for erection systems, and LRFD design and construction specifications. He was also the primary developer and author of the SHRP2 ABC Toolkit published in 2012 to promote ABC implementation nationally. Mr. Sivakumar has conducted ABC workshops, seminars and national webinars.

Engineering Practice and Research of Prefabricated Bridges in China

Liang Zhou Chief Engineer, Shanghai Urban Construction Design & Research Institute (Group) Co., Ltd., China Liang Zhou is regarded as one of the most prestigious bridge engineers in China. In the 38 years of his esteemed career, he has pioneered large span bridge design and the ABC method for viaduct construction in China. His ABC project achievements include the Humin Viaduct (3km long and 25m wide elevated expressway with streamline cross-section), Hengliaojing Bridge (55m+125m+55m continuous box girder bridge lifted-into-place) and Jiamin Viaduct (8km fully prefabricated bridge). Due to his significant contributions to Chinese bridge development, Mr. Zhou has won numerous awards, such as the 2008 Outstanding Structure Award (Shanghai Lupu Bridge) by the IABSE. Mr. Zhou is also actively involved in research and development; and is the chief editor of the Chinese National Code for Design of Steel-Concrete Composite Bridges.

22 | FEATURED KEYNOTE TALKS

Accelerated Bridge Construction for Long Span Bridges and Viaducts

Theodore P. Zoli III, PE Senior Vice President, National Bridge Chief Engineer, HNTB Corporation, New York, USA During Mr. Zoli’s 30+ years with HNTB, he has led the design of numerous innovative first-of-their kind bridges including the hybrid cable stayed Leonard P. Zakim Bunker Hill Bridge in Massachusetts, the network arch Lake Champlain Bridge between New York and Vermont, and the gusset-less truss for Memorial Bridge between Maine and New Hampshire. Licensed in 16 states, Mr. Zoli also currently serves as an adjunct professor at Columbia University and University of Notre Dame. He was named a MacArthur Fellow and selected as ENR’s Award of Excellence winner, considered the construction industry’s most prestigious honor.

For a full description of the Keynote talks, see page 34.

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 23

CONFERENCE SCHEDULE DECEMBER 8-10, 2021 WEDNESDAY DECEMBER 8

CONFERENCE WORKSHOP

9 a.m.–10 a.m.

Welcome and Keynote Talk

10 a.m.-12:55 p.m.

UHPC Based ABC Solutions, Sponsor Presentation, Entertainment, Awards, Exhibition

Workshop at a glance

ABC-UTC Ultra High Performance Concrete (UHPC) Workshop

12:55 p.m.–4:45 p.m.

Innovative Prefabricated Bridge Element and Systems Solutions, Sponsor Presentation, Entertainment

Virtual Workshop with Live Demonstration of Mixing UHPC

December 9 4:15 p.m.-8:45 p.m.

Session 1 Properties of ABC-UTC Non-Proprietary UHPC and Lessons Learned

December 10 4:15 p.m.-6:15 p.m.

Session 2 Practical Demonstration of ABC-UTC Non-Proprietary UHPC

5 p.m.–6 p.m. Reception

THURSDAY, DECEMBER 9 9 a.m.-10:45 a.m.

High-Speed Rail and Viaduct ABC Solutions, Sponsor Presentation, Entertainment

10:45 a.m.–1:05 p.m.

Project Delivery and Safety, Exhibition

1:05 p.m.–3:05 p.m.

ABC Case Studies, Sponsor Presentation, Entertainment

3:05 p.m.-3:55 p.m.

ABC Research and Case Studies

4:15 p.m.–8:45 p.m.

Workshop (see full workshop schedule on page 58)

FRIDAY, DECEMBER 10 9 a.m.–10:35 a.m.

UHPC Based Innovations and Solutions, Sponsor Presentation, Entertainment

10:35 a.m.–12:55 p.m. ABC Seismic Solutions, Exhibition 1:25 p.m.–3:55 p.m.

3D Printing and Automation in ABC, Sponsor Presentation and Entertainment

4:15 p.m.–6:15 p.m.

Workshop (see full workshop schedule on page 58)

24 | CONFERENCE SCHEDULE

See full workshop schedule on page 58

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 25

MAIN AGENDA DAY 1 (WEDNESDAY, DECEMBER 8, 2021) Time

Presenter

Country

Moderator

Title/Description

9:00-9:10

Atorod Azizinamini

U.S.A.

9:10-9:20

Carmen Swanwick

U.S.A.

Atorod Azizinamini

Welcome and National ABC Perspective Update

9:20-9:30

Congressman Mario Diaz-Balart

U.S.A.

Atorod Azizinamini

Remarks by U.S. Congressional Representative

9:30-9:40

Congressman Carlos A. Gimenez

U.S.A.

Atorod Azizinamini

Remarks by U.S. Congressional Representative

9:40-10:00

Firas Sheikh Ibrahim

U.S.A.

Atorod Azizinamini

U.S. Department of Transportation

WELCOME AND KEYNOTE TALK Welcome by ABC-UTC

UHPC BASED ABC SOLUTIONS 10:00-10:30

Eugen Brühwiler

Switzerland

Carmen Swanwick

Keynote Talk: UHPC Bridge Deck Overlays and Beyond

10:30-10:50

Jordy Eduardo Padilla

U.S.A.

Carmen Swanwick

The First Ultra High Performance Concrete (UHPC) Bridge Deck Overlay on a Major Suspension Bridge in the United States

10:50-11:10

Scott W. Muzenski

U.S.A.

Carmen Swanwick

Interface Shear Behavior of Ultra-High Performance Concrete

11:10 - 11:12

11:12 - 11:15

ENTERTAINMENT

11:15 - 11:35

Zachary Haber

U.S.A.

Carmen Swanwick

UHPC for Bridge Preservation and Repair: State of the Practice in the United States

11:35 - 12:05

Laurent Boiron

Switzerland

Cheryl Hersh Simmons

Keynote Talk: UHPC Field Applications in Switzerland

12:05- 12:25

AWARDS

26 | MAIN AGENDA

VIDEO DOUBLE DIAMOND

DAY 1 (WEDNESDAY, DECEMBER 8, 2021) Time

Presenter

12:25-12:55

Country

Moderator

Title/Description

VISITING EXHIBITORS IN THE EXHIBITOR HALL INNOVATIVE PREFABRICATED BRIDGE ELEMENT AND SYSTEM SOLUTIONS

12:55 - 1:25

Peter Collin

Sweden

Cheryl Hersh Simmons

Keynote Talk: Composite Bridges with Prefabricated Deck Elements

1:25 - 1:45

Huijun Shen

China

Cheryl Hersh Simmons

Segmental Prefabrication and Assembly Technology and Construction Monitoring of Box Girder with Corrugated Steel Webs of Jiangxinzhou Yangtze River Bridge in Nanjing

1:45 - 2:05

Hao Dai

China

Cheryl Hersh Simmons

Installation and Construction Technology of Offshore Prefabricated Piers and Abutments in Xiamen Second Channel

2:05 - 2:25

Andrew Martin Myles

Switzerland

Cheryl Hersh Simmons

Design and Construction of Prefabricated Bridge Replacement Enabling Continuous Passage of Trains

2:25 - 2:27

2:27 - 2:30

ENTERTAINMENT

2:30 - 2:50

Zhihua Xiong

China

Mary Lou Ralls Newman

Structural Performance of Prefabricated MVFT Continuous Girder Bridge

2:50 - 3:10

Atorod Azizinamini

U.S.A.

Mary Lou Ralls Newman

Extending Span Length of Folded Steel Plate Girder Bridge System

3:10 - 3:30

Logan Mullaney

Australia

Mary Lou Ralls Newman

Fires to Floods, InQuik’s Accelerated Bridge Construction Program to Replace 20 Bridges Impacted by Natural Disasters

3:30 - 3:35

ENTERTAINMENT

3:35 - 3:55

Changsu Shim

South Korea

Mary Lou Ralls Newman

DFMA for Prefabricated Bridges Using Digital Engineering Models

3:55 - 4:15

Michael Barker

U.S.A.

Mary Lou Ralls Newman

Accelerated Construction of Short Span Steel Bridges

4:15 - 4:45

Liang Zhou

China

Mary Lou Ralls Newman

Engineering Practice and Research of Prefabricated Bridges in China

5:00 - 6:00

RECEPTION

VIDEO DIAMOND

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 27

DAY 2 (THURSDAY, DECEMBER 9, 2021) Time

Presenter

Country

Moderator

Title/Description

HIGH-SPEED RAIL AND VIADUCT ABC SOLUTIONS 9:00 - 9:30

Gongyi Xu

China

Ahmad Abu-Hawash

Keynote Talk: Bridge Systems and Accelerated Bridge Construction Applications in the Chinese High-Speed Rail Network

9:30 - 9:50

Miguel Ortega Cornejo

Spain

Ahmad Abu-Hawash

Development of Accelerated Bridge Construction procedures for the Spanish High Speed Railway Composite Viaducts

9:50 - 10:10

Miguel Ortega Cornejo

Spain

Ahmad Abu-Hawash

Accelerated Bridge Construction of Concrete Box Girder Viaducts in the Spanish High Speed Railway Lines with the Use of Mobile Scaffolding System

10:10 - 10:40

Theodore P. Zoli

U.S.A.

Ahmad Abu-Hawash

Keynote Talk: Accelerated Bridge Construction for Long Span Bridges and Viaducts

10:40 - 10:42

10:42 - 10:45

ENTERTAINMENT

VIDEO DOUBLE DIAMOND PROJECT DELIVERY AND SAFETY

10:45 - 11:15

Tristan McDonnell Joost Schlebaum

U.K./ Netherlands

Mal Kerley

Keynote Talk: Building Information Modeling (BIM) for Transportation Infrastructure: The Future of Project Delivery and Asset Management

11:15 - 11:35

Kevin Scott McAlister

U.S.A.

Mal Kerley

I-24 Bridge Replacements CM/GC Project

11:35 - 11:55

Smita Sharma

U.S.A.

Mal Kerley

Prioritizing Safety and Mobility in Accelerated Bridge Construction Work Zones

11:55 - 12:15

Sébastien Verger Leboeuf

Canada

Mal Kerley

ABC Bridges in a Remote Area - Little Long Dam Safety

12:15 - 1:05

28 |  MAIN AGENDA

VISITING EXHIBITORS IN THE EXHIBITOR HALL

DAY 2 (THURSDAY, DECEMBER 9, 2021) Time

Presenter

Country

Moderator

Title/Description ABC CASE STUDIES

1:05 - 1:35

Michael P. Culmo

U.S.A.

Mary Lou Ralls Newman

Keynote Talk: Development of ABC Resources for Implementation of ABC in the United States

1:35 - 1:55

Patrick Gallagher

U.S.A.

Mary Lou Ralls Newman

Bone River Bridge, An Obscure Data Point Worth Considering

1:55 - 1:57

1:57 - 2:00

ENTERTAINMENT

2:00 - 2:20

Pak Ki So

U.S.A.

Mary Lou Ralls Newman

Innovative Design and Accelerated Construction Techniques for the Long Island Rail Road Expansion Project

2:20 - 2:40

William A. Geschrei

U.S.A.

Mary Lou Ralls Newman

Superstructure Modules at Bridges 3-155 N&S over Broadkill River, Sussex County, DE

2:40 - 3:00

Kumar K. Ghosh

U.S.A.

Mary Lou Ralls Newman

Reconstruction of Main Street Overcrossing

3:00 - 3:05

ENTERTAINMENT

VIDEO DIAMOND

ABC RESEARCH AND CASE STUDIES 3:05 - 3:35

Waseem Dekelbab

U.S.A.

Shoukry Elnehal

Keynote Talk: NCHRP Solving Transportation Challenges Through Research

3:35 - 3:55

Michelle Helsel

U.S.A.

Shoukry Elnehal

Thixotropic UHPC Overlays Bond Performance: A FHWA Research Update

4:15 - 8:45

WORKSHOP – SEE PAGE 58 FOR FULL WORKSHOP SCHEDULE

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 29

DAY 3 (FRIDAY, DECEMBER 10, 2021) Time

Presenter

Country

Moderator

Title/Description

UHPC BASED INNOVATIONS AND SOLUTIONS 9:00 - 9:50

Benjamin A. Graybeal

U.S.A.

Atorod Azizinamini

Keynote Talk: Bridge Design with UHPC and a Path Forward

9:50 - 10:10

Michael D. McDonagh

U.S.A.

Atorod Azizinamini

UHPC Repair of Steel Columns in the Walnut Tunnel in Philadelphia

10:10 - 10:30

Michael D. McDonagh

U.S.A.

Atorod Azizinamini

Innovative UHPC Mixing and Placing Techniques for Repair of Three Illinois Bridges

10:30 - 10:32

10:32 - 10:35

ENTERTAINMENT

VIDEO DOUBLE DIAMOND ABC SEISMIC SOLUTIONS

10:35 - 11:05

Bijan Khaleghi

U.S.A.

Paul Liles

Keynote Talk: ABC Trends and Practices in Seismic Regions

11:05 - 11:25

Sabina Piras

New Zealand

Paul Liles

A Low-Damage Dissipative Controlled Rocking Column Solution for Accelerated Bridge Construction (ABC) in Seismic Regions

11:25 - 11:45

Ge Wang

China

Paul Liles

Technology Development of Concrete Filled Steel Tubular Composite High Pier and Its Application in Strong Earthquake Area

11:45 - 12:05

Jiyan Zhang

China

Paul Liles

Investigation and Verification on Seismic Performances of Precast Bridge Columns with New Type of Pedestal Connections

12:05 - 12:55

12:55 - 1:25

Dorie E. Mellon Jay Holombo

VISITING EXHIBITORS IN THE EXHIBITOR HALL U.S.A.

Paul Liles

Keynote Talk: Caltrans Accelerated Bridge Construction Manual

3D PRINTING AND AUTOMATION IN ABC Zhang Al Min

1:45 - 1:47

1:47 - 1:50

ENTERTAINMENT

1:50 - 2:10

Atorod Azizinamini

U.S.A.

Giovanni Tambelini

3D-Prinitng of UHPC Shells for Bridge Element using Section Printing

2:10 - 2:30

Caizhi Sun

China

Giovanni Tambelini

Construction of Wenchuan Keku Bridge

2:30 - 3:00

Mike Schlaich

Germany

Giovanni Tambelini

Keynote Talk: Acceleration Versus Beauty? The Role of Prefabrication in Bridge Construction

3:00 - 3:05

ENTERTAINMENT

3:05 - 3:25

Hu Xu Dong

China

Giovanni Tambelini

Bridge Erecting Equipment in China

3:25 - 3:55

Bala Sivakumar

U.S.A.

Giovanni Tambelini

Keynote Talk: ABC-US Experience from Consultant Viewpoint and Opportunities

4:15 - 6:15

30 |  MAIN AGENDA

China

Giovanni Tambelini

Application of Intelligent Manufacturing in the Modern Prefabrication Beam Yard

1:25 - 1:45

VIDEO DIAMOND

WORKSHOP – SEE PAGE 58 FOR FULL WORKSHOP SCHEDULE

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 31

PRESENTATION

DESCRIPTIONS

Times are in EST (GMT-5)

32 | For detailed information about the conference, please visit https://abc-utc.fiu.edu/conference/

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 33

PRESENTATION TITLE: UHPC BRIDGE DECK OVERLAYS AND BEYOND Presenter (Keynote): Eugen Brühwiler Date: Wednesday, December 8 Time: 10:00 a.m. - 10:30 a.m.

Segment: UHPC Based ABC Solutions Presentation Description: Since the first pilot project in 2016, UHPC bridge deck overlays have quickly evolved in the U.S. into a novel technology to enhance existing bridge deck slabs and to accelerate rehabilitation works. This UHPC technology is based on developments in Europe, in particular in Switzerland. The lecture highlights major achievements worldwide and explores next steps in using UHPC to strengthen and modifying existing bridges as well as to design and build new road and railway bridges, while lowering the environmental impact of bridges and enhancing sustainability of built infrastructure. Finally, recent Research & Development activities will be highlighted.

PRESENTATION TITLE: THE FIRST ULTRA HIGH PERFORMANCE CONCRETE (UHPC) BRIDGE DECK OVERLAY ON A MAJOR SUSPENSION BRIDGE IN THE UNITED STATES Presenter: Jordy Eduardo Padilla Date: Wednesday, December 8 Time: 10:30 a.m. - 10:50 a.m.

Segment: UHPC Based ABC Solutions Presentation Description: The Delaware Memorial Bridge, composed of twin suspension bridges completed in 1951 and 1968, carries Interstate 295 and U.S. 40 across the Delaware River between Delaware and New Jersey. In 2018, the Delaware River and Bay Authority (DRBA) determined that the deck of the first structure was near the end of its service life. Through a 50-year lifecycle cost analysis, a partial-depth deck replacement overlay utilizing Ultra-High Performance Concrete (UHPC) was identified as the preferred alternative to deck replacement and conventional overlays. The mechanical and durability properties of UHPC significantly exceed the properties of conventional concrete

34 | PRESENTATION DESCRIPTIONS

and overlay materials, such that UHPC can dramatically extend the service life of the existing deck with minimal traffic impacts compared to deck replacement.

Being the first UHPC overlay on a suspension bridge, the DRBA decided to start with a pilot project constructed in 2020. The pilot project consisted of replacing the top 3.75 inches of the deck with UHPC on approximately 25,000 square feet of deck, incorporating overlays on the main suspension bridge as well as on the deck truss and steel girder approach structures. Construction of this project required flexibility from all team members due to the high traffic demands, the tight construction window, and the novel use of UHPC as a partial-depth deck replacement overlay. The completion of this pilot project set new milestones in the United States as the largest use of UHPC overlay on a project to date and with the largest continuous pour of UHPC overlay.

PRESENTATION TITLE: INTERFACE SHEAR BEHAVIOR OF ULTRA-HIGH PERFORMANCE CONCRETE Presenter: Scott W. Muzenski Date: Wednesday, December 8 Time: 10:50 a.m. - 11:10 a.m.

Segment: UHPC Based ABC Solutions Presentation Description: The use of ultra-high performance concrete (UHPC) in structural elements is becoming a compelling alternative to conventional concrete because of its unique properties. This cement-based material provides exceptional durability, compressive strength, and tensile properties which makes it an ideal candidate for structural members and field-cast connections in accelerated bridge construction (ABC). However, geometric discontinuities in UHPC structural elements and cold-jointed UHPC connections between prefabricated elements must be designed to provide sufficient capacity and thus require an understanding of interface shear properties of UHPC. The interface shear properties of conventional concrete are well understood, but the interface shear behavior of UHPC is not well documented in the literature. Furthermore, the unique properties of UHPC lead to uncertainties of whether existing conventional concrete behavior and capacity formulations

are applicable. This research is aimed to develop behavioral models and predictive relationships that could be implemented in design specifications. A number of large-scale interface shear tests were completed. The parameters studied included: monolithically cast UHPC, non-monolithic (or cold-jointed) UHPC with different substrate surface preparations, grade of reinforcing steel and reinforcement ratios, and UHPC fiber volume fraction. It was found that monolithically cast UHPC can provide increased resistance to interface shear compared with conventional concrete due in part to the increased clamping pressures provided by the tensile properties of UHPC. Conversely, in some cases, non-monolithically cast UHPC may provide lower resistance to interface shear compared with conventional concrete because a cast UHPC surface finish often replicates the surface of the formwork and thus lacks the microtexture that would commonly be present with conventional concrete. An overview of the study results and design recommendations will be provided.

PRESENTATION TITLE: UHPC FOR BRIDGE PRESERVATION AND REPAIR: STATE OF THE PRACTICE IN THE UNITED STATES Presenter: Zachary Haber Date: Wednesday, December 8 Time: 11:15 a.m. - 11:35 a.m.

Segment: UHPC Based ABC Solutions

presentation is to brief attendees on the state of the practice of UHPC for P&R in the United States, and discuss how current Federal Highway Administration (FHWA) efforts are promoting the use of this innovative technology.

PRESENTATION TITLE: UHPC FIELD APPLICATIONS IN SWITZERLAND Presenter (Keynote): Laurent Boiron Date: Wednesday, December 8 Time: 11:35 a.m. - 12:05 p.m.

Segment: UHPC Based ABC Solutions Presentation Description: Since 2003, more than 11’000 m3 (14’400 yd3) of UHPC have been built in Switzerland. The main volumes are realized as protective and/or reinforcement layer. The lecture will present a few emblematic projects built recently. The focus will be on the contractor’s point of view about adapting building methods and production capacity to the jobsite with its room and schedule restrictions. A quick summary of other technically interesting projects will be presented to show new possible applications of UHPC in railway and highway.

PRESENTATION TITLE: COMPOSITE BRIDGES WITH PREFABRICATED DECK ELEMENTS

Presentation Description: Keeping bridges in a state of good repair is essential to keeping transportation systems operating efficiently. Agencies at all levels can deploy ultra-high performance concrete (UHPC) for bridge preservation and repair (P&R) to maintain and improve bridge conditions and, in some cases, rapidly strengthen bridge structures in a cost-effective manner. UHPC, a fiber-reinforced, cementitious composite material with mechanical and durability properties that exceed those of conventional concrete materials, can be an optimum solution for bridge infrastructure (P&R). As such, UHPC can offer improved lifecycle cost performance over traditional methods. Promising applications include bridge deck overlays, girder end repairs, expansion joint repairs, repair of prefabricated bridge element (PBE) connections, and column or pile jacketing. The primary goal of this

Presenter (Keynote): Peter Collin Date: Wednesday, December 8 Time: 12:55 p.m.-1:25 p.m.

Segment: Innovative Prefabricated Bridge Element and System Solutions Presentation Description: One major advantage of composite bridges compared to concrete bridges is that the steel girders can carry the weight of the formwork and the wet concrete. Another advantage is the savings in construction time, which saves some money for the contractor but even more so for the road users, a fact that usually is neglected when evaluating alternative bridge designs.

A further step to improve the competitiveness of composite bridges is to prefabricate not only the steel girders, but also the concrete deck. Dr. Collin will present a unique concept with dry joints between the elements, used in designing

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 35

three bridges. Another technique that reduces the investment as well as the maintenance costs, is integral abutments. In this case, the end piers, expansion joints and bearings are excluded, and the piles are introduced in the end screens at the ends of the bridge. Measurements from a real bridge as well as laboratory tests on low cycle fatigue of the piles will be presented.

PRESENTATION TITLE: SEGMENTAL PREFABRICATION AND ASSEMBLY TECHNOLOGY AND CONSTRUCTION MONITORING OF BOX GIRDER WITH CORRUGATED STEEL WEBS OF JIANGXINZHOU YANGTZE RIVER BRIDGE IN NANJING Presenter: Huijun Shen Date: Wednesday, December 8 Time: 1:25 p.m. - 1:45 p.m.

Segment: Innovative Prefabricated Bridge Element and System Solutions Presentation Description: The three approach bridges of Jiangxinzhou Yangtze River Bridge in Nanjing are prestressed concrete box girder bridges with corrugated steel webs. The main girder are constructed by short-line matching prefabrication and cantilever assembly of bridge erectors, which is the first domestic and foreign initiative. In view of the technical problems existing in this process, a large number of schemes comparison and engineering verification work have been carried out, and finally the key technology of segmental precast assembly of box girder with corrugated steel webs of large span and variable cross-section was formed. At the same time, the key points and control measures of linear control in the whole process of manufacturing corrugated steel webs, precasting and installing corrugated steel webs composite box girder are proposed, and the whole process adaptive geometric control system is established. In addition, the stress and alignment of the bridge using the new technology during the construction period are monitored, and compared with the numerical simulation results so as to reveal the actual stress situation of segmental prefabricated assembled box girder with corrugated steel web in the construction process. The results show that the stress distribution of box girder with corrugated steel web in elastic stage formed by segmental precast assembly process is almost the same as that of cast-in-situ beam. In the construction

36 | PRESENTATION DESCRIPTIONS

process of the project, a special matching prefabricated template system was developed, which can meet the requirements of rapid template entry of corrugated steel webs, high-precision positioning and matching connection, and high-quality casting of steel-concrete joints. The application of steel cage partial molding process can not only ensure the construction accuracy but also improve the construction efficiency. According to the characteristics of short-line matching prefabrication process in the manufacturing of corrugated steel web segment and its positioning and installation in the template, a more reasonable manufacturing and positioning standard of corrugated steel web is proposed in combination with field practice. A number of measures are proposed to ensure the structural safety and accurate tightness of the composite beam section with corrugated steel webs during hoisting and transportation. The innovative practice of this project has produced good economic and social benefits, which can provide new ideas for the assembly construction of medium-span composite girder bridges in China.

PRESENTATION TITLE: INSTALLATION AND CONSTRUCTION TECHNOLOGY OF OFFSHORE PREFABRICATED PIERS AND ABUTMENTS IN XIAMEN SECOND CHANNEL Presenter: Hao Dai Date: Wednesday, December 8 Time: 1:45 p.m. - 2:05 p.m.

Segment: Innovative Prefabricated Bridge Element and System Solutions Presentation Description: Affected by complex factors of the marine environment, the construction of the cross-sea bridge faces many difficulties.

In response to the national green construction concept of “large scale, factorization, standardization, and assembly”, shortening the operation time at sea, and improving the efficiency of operation, the pier in Xiamen Second Channel adopts full prefabricated assembly construction technology, and the largest piers weight is up to 2700t, with high risk of on-site installation, difficult water stop, and high precision control requirements. In response to the above problems, this paper comprehensively utilizes research methods such as process test, numerical calculation, and field detection. We propose a new

type of steel plate rubber water stop solution, high pier position adjustment control technology, etc., which provide theoretical support for the lifting of super large and super heavy prefabricated piers. It can provide reference for the construction of similar projects.

PRESENTATION TITLE: DESIGN AND CONSTRUCTION OF PREFABRICATED BRIDGE REPLACEMENT ENABLING CONTINUOUS PASSAGE OF TRAINS Presenter: Andrew Martin Myles Date: Wednesday, December 8 Time: 2:05 p.m. - 2:25 p.m.

Segment: Innovative Prefabricated Bridge Element and System Solutions Presentation Description: Railway companies success relies on the continuous and safe passage of locomotives, which becomes even more important on a double main line. An hour delay can have costly impacts, preventing the timely transportation and delivery of products to the end consumer. Thus, bridge maintenance and replacement are a critical and ever-present challenge to the day-to-day operations of the railroad. The CSX Florence project team was faced with a challenge to replace a rapidly decaying timber structure in the same location, while allowing the safe passage of trains over a steep ravine. The work had to be performed without delaying the approximate 16 trains that travel over the bridge every 24 hours, which maximized the level of difficulty and importance of planning. To achieve this, the team designed the new superstructure to incorporate prefabricated materials, including six steel girder spans, 34 precast deck panels, two pre-cast backwalls, and four pre-cast wing walls. The substructure was designed with four cast-in-place pier caps and eight drilled shaft foundations. The length of the pier caps was increased to fall outside the extents of the existing structure, enabling the excavation and installation of all eight drilled shafts without requiring modifications to the existing structure or any stoppage of trains. Final elevation of the pier caps was designed below the existing superstructure allowing space for the caps to be formed and placed without impeding the movement of trains. Once the substructure was complete, a demolition plan was formulated dividing the existing bridge into six sections, each of which would be removed and replaced during separate six-hour windows.

During these windows, movement of trains was stopped on one of the two tracks, and a slow order was placed on the opposite track to allow trains to travel over the bridge at low speeds while each section was replaced. Once the track was shut down, the rails were cut and a crane removed one section of existing bridge using pre-installed rigging. The removed section was placed on one of two temporary trestle bridges built for access. Once the timber pile had been cut below the pier caps, the prefabricated steel girders were set in place and secured. The pre-cast deck panels were then installed, allowing the track panel and ballast to be placed, completing the tie-in of the new structure to the old.

This process was repeated until all sections of the bridge were completed over a span of two weeks. Spans were replaced every other day, allowing one day in between to stage the prefabricated materials and remove the previous section of existing bridge from site. Once all six sections were replaced, the wing walls were installed, and the ravine was re-graded and covered in riprap to prevent erosion. With careful planning and execution, the CSX Florence team delivered the successful and complete replacement of the existing timber structure with the new concrete and steel structure. The entire process was accomplished without obstructing or delaying the day-to-day operation of trains and maintenance to the railroad infrastructure.

PRESENTATION TITLE: STRUCTURAL PERFORMANCE OF PREFABRICATED MVFT CONTINUOUS GIRDER BRIDGE Presenter: Zhihua Xiong Date: Wednesday, December 8 Time: 2:30 p.m. - 2:50 p.m.

Segment: Innovative Prefabricated Bridge Element and System Solutions Presentation Description: The convenience of construction and economic costs play important roles in promoting the construction of the small span bridge.

Based on the VFT beam widely used in Germany and other European countries, the prefabricated MVFT girder suitable for small span bridge is proposed.

The beam section composed of trough steel beams and concrete is firstly prefabricated in factory and transported to the construction site for installation and laying before placing wet joints to form the overall structure. In this paper,

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 37

the authors studied a 3 × 40m MVFT continuous girder bridge and performed the construction and stress analysis of the bridge. Taking the bridge structure stiffness and steel cost into consideration, the live load structure index (LLSI) was introduced to evaluate the application efficiency of the steel bridge under different structural schemes. Besides, this paper provided the analysis of the CL zigzag shear joint connecting the steel web and the concrete, and results show that the MVFT girder not only has excellent structural performance, but also has the advantages of overall prefabrication and rapid construction, which presents its prospect in the small-span bridge construction.

PRESENTATION TITLE: EXTENDING SPAN LENGTH OF FOLDED STEEL PLATE GIRDER BRIDGE SYSTEM Presenter: Atorod Azizinamini Date: Wednesday, December 8 Time: 2:50 p.m. - 3:10 p.m.

Segment: Innovative Prefabricated Bridge Element and System Solutions Presentation Description: Folded steel plate girder (FSPG) is fabricated from a single steel plate of uniform thickness that is bent along multiple lines using a hydraulic metal press brake, forming a trapezoidal-shaped section that is open at the bottom. The FSPG system eliminates the need for internal and external cross frames due to the large amount of lateral stiffness generated by the design. The absence of cross frames in the system results in less costly details, and the need for welding is significantly reduced. The maximum span length of a girder fabricated from a single plate was limited by the size of the press brake. The folded steel plate girder system was recently utilized in several bridges in Nebraska, Pennsylvania and Michigan. Methodologies were developed to extend the maximum length of the Folded Steel Plate Girder Bridge System to about 105 ft. Work consisted of envisioning the connection detail, carrying out numerous non-linear finite element analysis and developing the proof of concept test that includes testing two FSGBS with types of connections envisioned. This presentation discusses the testing of one test specimen under both fatigue loading and ultimate loading.

38 | PRESENTATION DESCRIPTIONS

PRESENTATION TITLE: FIRES TO FLOODS, INQUIK’S ACCELERATED BRIDGE CONSTRUCTION PROGRAM TO REPLACE 20 BRIDGES IMPACTED

BY NATURAL DISASTERS Presenter: Logan Mullaney Date: Wednesday, December 8 Time: 3:10 p.m. - 3:30 p.m.

Segment: Innovative Prefabricated Bridge Element and System Solutions Presentation Description: Devastating bushfires spanned across almost half of the East Coast of Australia during the Summer of 2019. The Currowan Fire burnt for 74 days, across almost 500,000 hectares, destroying 312 homes and damaging another 173. The fire spread across four local governments, being Eurobodalla, Wingecarribee, Queanbeyan-Palerang and Shoalhaven. When the fire was finally put out after considerable rain, then came the re-build. This presentation will detail the severity of the impact and the challenges faced and overcome to restore access to this region, through the use of local labor and the innovative InQuik Bridge System. The InQuik Bridge system is an Australian proprietary concrete bridge system, where formwork and reinforcement modules are pre-fabricated and delivered to the site without any concrete. The elements are self-supporting and once onsite, they are placed into position and filled with concrete. InQuik Bridges have been installed in as little as five days including foundation install, and since introducing the system in Australia in 2017, well over 100 bridges have been constructed all over Australia, demonstrating the high demand for this revolutionary technology. During the fires across the state of NSW, some 60 government owned bridges were burnt or damaged. During the Currowan fire, Shoalhaven region lost four bridges on their road network, Eurobodalla some 16 bridges, Queanbeyan had several damaged and many more across Bega Shire. Having worked closely with the councils previously, InQuik offered their support to help accelerate the bridge construction, including design and geotechnical investigation. Two of the major bridges for Shoalhaven Council were School Creek, a 16m bridge, which was 6m off the waterway, with serious access issues including no semi-trailer access, and Toombaloomba Bridge, which was a 24m 2 span bridge, in a very remote area, with limited access and a 5 tonne load limited bridge on one side. InQuik worked very closely with Shoalhaven Council to pull together the designer and local contractors to get the projects delivered, getting access back up

and running as fast as possible. Working with local contractors to deliver the project ensured funds and jobs were kept in the local community, delivering a great result. InQuik also worked with Eurobodalla Council to deliver 11 bridges within nine months in some very remote locations with similar access issues.

The presentation will also focus on some technical attributes of the Proprietary InQuik Bridge System, where the system utilises the permanent reinforcement steel to support the self-weight of the concrete, as well as the permanent and live loads. The solution includes sub-structure elements such as Abutments, Piers and Headstocks, as well as Deck units. The InQuik System has been recognized with many international awards, including Engineers Australia, with the Award for Excellence for the Canberra Division, and nomination for the highest award in Engineering in Australia. The globally patented system is also being introduced internationally including the USA, and seen to be a revolutionary accelerated bridge construction methodology.

PRESENTATION TITLE: DFMA FOR PREFABRICATED BRIDGES USING DIGITAL ENGINEERING MODELS Presenter: Changsu Shim Date: Wednesday, December 8 Time: 3:35 p.m. - 3:55 p.m.

Segment: Innovative Prefabricated Bridge Element and System Solutions Presentation Description: DfMA (design for manufacturing and assembly) is a new challenging task in the bridge construction industry. Data-driven or digital model-driven design is required to realize DfMA. Digital models for design, fabrication and assembly are defined by domain knowledge on prefabricated bridges. Data models and model authoring algorithms are developed to support this new approach. In this paper, digital engineering models for prefabricated bridge members are proposed for information delivery through the whole life cycle of a bridge. Digital design models are defined to accommodate geometry change and tolerance of prefabricated members during fabrication and the assembly process. Automatic fabrication of the prefabricated members is realized by digital fabrication models which are transferred to a robot or a 3D concrete printer. 3D inspection of the fabricated members allows revision of the digital

models for the preassembly process. For fully prefabricated bridges, it is required to guarantee the allowable tolerance before delivery of the members to the site.

There is increased demand for very effective coordination and communication among participants. For a highway bridge project, a pilot application of the smart prefabrication is introduced.

PRESENTATION TITLE: ACCELERATED CONSTRUCTION OF SHORT SPAN STEEL BRIDGES Presenter: Michael Barker Date: Wednesday, December 8 Time: 3:55 p.m. - 4:15 p.m.

Segment: Innovative Prefabricated Bridge Element and System Solutions Presentation Description: Accelerated Bridge Construction (ABC) is bridge construction that uses planning, design, material selection, and construction methods to reduce the onsite construction time and mobility impacts that occur when building new bridges or replacing and rehabilitating existing bridges.

Short span steel bridges (under 140 feet / 50 meters) can be fabricated offsite in a controlled environment and are ready to erect upon reaching the bridge site. Erection reinforcement and formwork installation can be avoided.

Material choice can reduce weight, resulting in lighter equipment needs and fewer cranes than other materials for the same span. Prefabricated steel bridges accelerate construction, decrease traffic disruption, lessen overall project costs, and reduce on-site labor requirements by using local crews.

Prefabricated steel bridges are also safe, reducing the exposure of workers and the public to construction activities as well as environmental impacts.

Steel bridges meet owners and the public’s desire for economy, aesthetics, performance and accelerated bridge construction. Bridge manufacturers and fabricators have developed innovative, efficient, and economical solutions to meet bridge project needs. Several different types of bridge projects from manufacturers and prefabricated built bridges will be showcased to demonstrate their merits in bridge quality and accelerated construction.

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PRESENTATION TITLE: ENGINEERING PRACTICE AND RESEARCH OF PREFABRICATED BRIDGES IN CHINA Presenter (Keynote): Liang Zhou Date: Wednesday, December 8 Time: 4:15 p.m. - 4:45 p.m.

Segment: Innovative Prefabricated Bridge Element and System Solutions Presentation Description: Prefabricated bridge technology is widely regarded as an efficient, low-carbon and environmentally-friendly bridge construction technology. Benefit tinged from its large infrastructure construction program and efficient manufacturing base, China has made significant progress in the design, construction method and equipment for prefabricated bridges. This presentation provides a comprehensive introduction to prefabricated bridges and ABC construction in China, with a focus on 1) representative ABC technologies with project examples; 2) fabrication and erection equipment for bridge superstructures; and 3) engineering practice and research on connection details for prefabricated bridge substructure systems.

PRESENTATION TITLE: BRIDGE SYSTEMS AND ACCELERATED BRIDGE CONSTRUCTION APPLICATIONS IN THE CHINESE HIGH-SPEED RAIL NETWORK Presenter (Keynote): Gongyi Xu Date: Thursday, December 9 Time: 9:00 a.m. - 9:30 a.m.

Segment: High-Speed Rail and Viaduct ABC Solutions Presentation Description: About half the length of the 39000 km Chinese Highspeed Railroad network are on bridges. Chinese bridge engineers have developed many innovative solutions to meet the challenges from vast and diversified environments. In the western part of China, the network passes through mountainous terrain with deep gorges and high seismic area. In the eastern part of China, engineers must navigate through dense urban development with unique structures or cross major rivers with long span bridges.

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PRESENTATION TITLE: DEVELOPMENT OF ACCELERATED BRIDGE CONSTRUCTION PROCEDURES FOR THE SPANISH HIGH SPEED RAILWAY COMPOSITE VIADUCTS Presenter: Miguel Ortega Cornejo Date: Thursday, December 9 Time: 9:30 a.m. - 9:50 a.m.

Segment: High-Speed Rail and Viaduct ABC Solutions Presentation Description: Spain is the country in the world with the largest High Speed Railway Network after China. With more than 3,400 km in service, currently Spain has more H.S.R. km than Japan, France or Germany. All the bridges of the first High Speed Line, Madrid-Seville, commissioned in 1992, were prestressed concrete bridges. IDEAM, a company of T.Y. Lin International Group, has been the forerunner in the design of composite (steel & concrete) bridges in Spain for more than 40 years, and has been the company that designed the first composite Viaducts on the Spanish High Speed Railway Lines. Viaducts such as Arroyo las Piedras Viaduct, the fist composite viaduct in the Spanish Railway Lines with a total length of 1208 m and maximum piers height of 96 m, designed in 2001 and in service since 2005, or Archidona Viaduct, the longest in the world without joints and expansion devices with 3150 m, have been a milestone in the Accelerated Bridge Construction (ABC) of composite Viaducts in HSR. The solution designed by IDEAM in Arroyo las Piedras, more than 20 years ago, using a twin girder composite solution with double composite action in hogging areas and generalized in the whole length of the deck for improving the torsional resistance of the cross section, was used 10 years later in France, and nowadays this solution is presented as a great novelty at the HS2 in the UK, almost 20 years after its original design by IDEAM in Spain. The presentation will explain the different ABC procedures used in the execution of both Viaducts and will also describe in detail what is currently the world’s longest-span High Speed Composite truss, the Viaduct over the Ulla River, 1620 m long and with three large spans of 225 + 240 + 225 m, which represented a significant leave with respect to the previous record of the world in this typology, the Nantenback Viaduct with a central single span and 208 m.

The Viaduct over river Ulla consists of a composite truss bridge with double composite action that was executed with three different and very complex construction processes, achieving very tight execution times.

PRESENTATION TITLE: ACCELERATED BRIDGE CONSTRUCTION OF CONCRETE BOX GIRDER VIADUCTS IN THE SPANISH HIGH SPEED RAILWAY LINES WITH THE USE OF MOBILE SCAFFOLDING SYSTEM Presenter: Miguel Ortega Cornejo Date: Thursday, December 9 Time: 9:50 a.m. - 10:10 a.m.

Segment: High-Speed Rail and Viaduct ABC Solutions Presentation Description: Spain is the country with the largest High Speed Railway Network after China. With more than 3,400 km in service, currently Spain has more H.S.R. km than Japan, France or Germany. The orography of Spain and the strict conditions imposed by the layout of the high-speed lines forces long Viaducts with high piers in many situations. For more than 30 years, the use of Mobile Scaffolding System has been widely developed as a very effective Accelerated Bridge Construction method in prestressed concrete box girders in the Spanish High Speed Railway Lines. IDEAM, a company of T.Y. Lin International Group, has carried out in the last decades a series of outstanding projects with this typological solution and construction process, reaching great execution yields. The range of span was between 45 and 80 m, with pile heights of up to 86 m. The presentation will describe in detail the particularities of the different solutions designed in several long concrete box girder bridges in the Spanish HSR Lines. The talk will also describe the use of this solution in two very important road bridges, New Pumarejo bridge in Barranquilla, Colombia, with the access viaducts built using this method with a very wide concrete box girder and a typical span of 70 m, and the last project designed by IDEAM for a road Viaduct in Sabiñánigo, Huesca, that is currently under construction and that will become the span world record using this typology with 90 m span.

PRESENTATION TITLE: ACCELERATED BRIDGE CONSTRUCTION FOR LONG SPAN BRIDGES AND VIADUCTS Presenter (Keynote): Theodore P. Zoli Date: Thursday, December 9 Time: 10:10 a.m. - 10:40 a.m.

Segment: High-Speed Rail and Viaduct ABC Solutions Presentation Description: Accelerated Bridge Construction (ABC) has demonstrated value across the entire spectrum of bridge types. With a focus on the design and construction of recent long-span bridges and viaducts, this presentation will describe the use of ABC techniques and their impact on fasttrack bridge/viaduct replacement projects. While the use of ABC has resulted in significant time savings in delivering long-span bridges and viaducts, the potential for these structural systems to have enhanced redundancy and robustness and to incorporate components that are easier to inspect and replace cannot be overlooked.

PRESENTATION TITLE: BUILDING INFORMATION MODELING (BIM) FOR TRANSPORTATION INFRASTRUCTURE: THE FUTURE OF PROJECT DELIVERY AND ASSET MANAGEMENT Presenter (Keynote): Tristan McDonnell and Joost Schlebaum Date: Thursday, December 9 Time: 10:45 a.m. - 11:15 a.m.

Segment: Project Delivery and Safety Presentation Description: Building Information Modeling (BIM) has been widely used in the vertical industry, however, due to the lack of national BIM standards, its use for transportation infrastructure has been very limited. To overcome these challenges significant efforts by state DOTs are underway. These efforts include collaboration with buildingSmartInternational (bSI) and software developers to advance BIM adoption in the US. This presentation will provide an overview of the bSI Infrastructure Room where global partners are working alongside industry peers to develop an international open data standard (called IFC4.3) for road and bridge modeling that is now being implemented by leading software vendors.

This same IFC Schema has now been adopted by AASHTO for member States to

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apply as a national standard for engineering model data in the US. Three case studies will be presented on projects in Germany, the Netherlands and the UK to illustrate how Arup, a major participant in bSI Infrastructure Room, is using BIM and the IFC open standard for better bridge design, more efficient collaboration with contractors and enhanced information exchange with clients for asset management. The case studies are: 1.

Schwelmetalbrucke bridge, Germany– a bridge renovation project that pushes boundaries by delivering the project using IFC schema, as required by the German highway agency. The IFC deliverables contained the full phasing, temporary works and the geometry as well as asset management related parameters.

2. Van Brienenoord bridge, Rotterdam – the busiest bridge in the Netherlands.

The proposal is to remove and replace part of the bridge with a refurbished bridge, embracing circular economy principles. Arup is delivering IFC to our client and to the contractor. The IFC files contain asset management related parameters.

3. RAF Newton bridge, UK – a footbridge that will provide a link across the A46 connecting the former RAF Newton site providing a catalyst for growth in the area. Arup has applied a parametric modeling approach and cloud based co-ordination as well as delivering the design as IFC.

PRESENTATION TITLE: I-24 BRIDGE REPLACEMENTS CM/GC PROJECT Presenter: Kevin Scott McAlister Date: Thursday, December 9 Time: 11:15 a.m. - 11:35 a.m.

Segment: Project Delivery and Safety Presentation Description: The I-24 bridge over S. Germantown Road and the Belvoir Avenue bridge over I-24 have aged to the point of replacement. Traffic demands along this busy stretch of I-24 in Chattanooga have also steadily increased over the design life of these bridges and the Interstate needs more capacity. The project was selected for the innovative CM/GC alternative delivery method by TDOT Construction’s Alternative Contracting Division before

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advertising in 2017. This would become only the third project of its kind in the state’s history.

Design scope and CM/GC process. The project scope would utilize Accelerated Bridge Construction (ABC) techniques to minimize impacts on vehicular traffic while replacing the bridges and increasing Interstate capacity. As part of the CM/GC process, TDOT selects a designer and construction manager (CM) to participate in the design and review process. As design proceeds the CM provides price information, constructability, scheduling, construction phasing, and sequencing information to the owner. At approximately 60 to 90% design completion, the owner and CM agree on a Guaranteed Maximum Price for the construction of the project. If the negotiations are successful, the CM becomes the General Contractor (GC). If they are not able to negotiate an acceptable price, the owner has the option of completing the design and letting a traditional bid-build contract for construction.

Design and Construction. The I-24 bridge over Germantown Road will be replaced utilizing ABC techniques to minimize traffic impacts to the motoring public. Over 100,000 vehicles per day travel through this busy corridor of I-24.

As part of the CM/GC process the design was tailored to meet the strengths of the GC to minimize risk and cost. At the S. Germantown Road bridge, new stem wall abutments bearing on micro piles drilled to depths exceeding 160’ will be constructed under the existing bridge. This will allow the contractor to accelerate his work schedule while not impacting traffic. During three weekend closures, I-24 traffic will be diverted around the S. Germantown Road bridge and onto N. and S. Terrace to allow the contractor to replace the superstructure in an accelerated window of only 58 hours. The Belvoir Avenue bridge over I-24 will also be replaced by using traditional bridge construction techniques since traffic demands on the bridge were relatively low. The project scope also included three (3) MSE walls, construction of two temporary slip ramps to facilitate weekend traffic shifts, and 172 micropiles. The contract was awarded in February 2020 with a guaranteed maximum price for the project of $32.9M. Scheduled completion date is August 2021.

PRESENTATION TITLE: PRIORITIZING SAFETY AND MOBILITY IN ACCELERATED BRIDGE CONSTRUCTION WORK ZONES Presenter: Smita Sharma Date: Thursday, December 9 Time: 11:35 a.m. - 11:55 a.m.

Segment: Project Delivery and Safety Presentation Description: The natural aging of existing roadway bridges leads to a growing number of bridge construction and rehabilitation work zones.

Effective transportation management plans for these projects help manage the work zone impacts including minimizing traffic delays, maintaining safety, conforming to project schedule and maintaining accessibility. This presentation focusses on two key attributes: safety and mobility, using real-world examples of accelerated bridge construction and rehabilitation projects. Unfamiliar and potentially dangerous driving situations in and around work zones can lead to crashes and traffic delays in and around work zones especially on urban arterials and freeways with high daily traffic. Fortunately, technology is providing new solutions to these problems at an accelerated rate. By combining the best of these new technologies, agencies can achieve four objectives: (1) effectively reduce injury and fatal crashes to help with Vision Zero goals, (2) mitigate traffic congestion through work zones (congestion is often correlated with crash rates particularly for rear-end crashes, (3) reduce user delay costs to motorists (costs can easily climb to millions of dollars), (4) reduce duration of construction by using accelerated construction methods. Bridge projects with high volume and high-speed traffic operations can be challenging to provide a safe work environment for the workers with minimum impact to the road users. Developing a maintenance of traffic (MOT) plan and construction sequencing for such projects includes safe access to/from the work zone for workers and construction equipment with minimal impact to the traveling public. The least expensive way to reduce user delay costs is to allow non-peak lane closures using plastic delineation to separate the work zone from travel lanes. However, flexible positive protection options exist. Moveable barrier technology mitigates traffic congestion by quickly establishing the lane closure, under traffic, with the benefit of concrete barrier to increase work zone safety. A strategic Accelerated Bridge Construction (ABC) project avoids gridlock and community outrage due to safety and

congestion issues. For example, Massachusetts DOT’s I-93 Fast 14 project used positively protected moveable barriers for lane closures based on traffic pattern to complete the reconstruction of 14 bridges during 10 weekends in the summer of 2011. Total project time was reduced from 4 years to 10 months. When Virginia DOT decided to rehabilitate 11 bridges along I-95 in the Richmond, VA area, the massive negative impacts on commuters during construction were considered to develop a construction phasing and MOT plan. An ABC program allowed for 10-hour night shift construction by narrowing roadway from three lanes to one lane while keeping an emergency lane open. Keeping safety and mobility in mind, moveable barrier was used for MOT and increased work zone space which helped the project’s completion three months ahead of schedule and $16 million under budget. The presentation will engage the audience in a discussion on: 1) importance of a safety-first approach to traffic management plans, 2) real-world lessons from ABC projects prioritizing safety and mobility, and 3) technologybased solutions (moveable barrier, automated traffic control technology, remote asset management, etc.) for safety and mobility in ABC work zones.

PRESENTATION TITLE: ABC BRIDGES IN REMOTE AREA LITTLE LONG DAM SAFETY Presenter: Sébastien Verger Leboeuf Date: Thursday, December 9 Time: 11:55 a.m. - 12:15 p.m.

Segment: Project Delivery and Safety Presentation Description: Ontario Power Generation’s (OPG) Lower Mattagami River hydroelectric complex is located approximately 950 km (590 miles – 10 hours trip) northwest of Ottawa, Ontario, Canada. It consists of four hydroelectric generating stations with sluiceway structures. It also includes a control dam sluiceway structure: “The Adam Creek Sluiceway (ACS)”. This structure is a composite dam constructed from 1960 to 1963. It consists of eight sluiceway bays and a road deck above. OPG is currently undertaking the “Little Long Dam Safety Project”, to ensure that the Little Long Main Dam provides sufficient capacity to spill the most recently evaluated Inflow Design Flood. The project includes, among other elements, the construction of four

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additional bays at Adam Creek to increase the spill capacity. Two new bridges will be built, each covering two new bays. The bridge consists of a road deck for the normal traffic and a service deck for the maintenance and operation of the Sluiceway. Each bridge is 30 m (98 ft) long and 17.5 m (57.4 ft) wide. The design of these bridges was completed in 2021 and the construction of the bridges should start in Spring 2022. In this complex interdisciplinary project, 3D modelling using BIM was necessary to ease the coordination and avoid conflicts between all disciplines. Construction must be executed using ABC techniques, as work will block the only link to one generating station, and the activities on the sluiceway restrict work to short periods of time only. One of the multiple ABC techniques used on this project is to construct a temporary steel structure to hold the bridge in place while the dam will be poured underneath. The remote location of the site and the shape of the access road require to minimize the number of elements to be shipped and limit their geometry to 18.3 m (60 ft) long and 3.8 m wide. The preferred solution consists of a 210 mm (8.25 in) thick full-depth precast deck panels with WWF1200x380 (WWF47x255) steel girders. Steel girders will be shipped in three pieces, then assembled on-site.

To optimize the number of girders, the Road and Service deck were combined into a single bridge, reducing the total number of girders from nine to seven.

The design of the bridges took into account that the construction may occurred during Winter, adding complexity due to the harsh climate at this latitude.

UHPC was chosen to minimize the quantity of concrete poured on-site, easing the work and avoiding the need for waterproofing membrane and asphalt. The Service deck will be used for the operation and maintenance of the new bays and the mechanical equipment. To achieve such operation, a 200 m.t. (440 t.) crane must be used, which corresponds to a maximum pad load of 1000 kN (225 kips). Futhermore, a 19.6 m (64 ft) staircase for the access of the upper mechanical area is located on the service deck, applying a maximum load of 520 kN (117 kips) per bearings.

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PRESENTATION TITLE: DEVELOPMENT OF ABC RESOURCES FOR IMPLEMENTATION OF ABC IN THE UNITED STATES Presenter (Keynote): Michael P. Culmo Date: Thursday, December 9 Time: 1:05 p.m. - 1:35 p.m.

Segment: ABC Case Studies Presentation Description: Accelerated Bridge Construction has been used in the United States for decades. Prior to the early 2000s, ABC was used for special projects where there were no other options. Since then, key stakeholders including AASHTO, FHWA, NCHRP, State Departments of Transportation, academia and industry have progressed the field of ABC to make it common practice in virtually every state. Early ABC projects were designed using the AASHTO LRFD Bridge Design Specifications, along with a healthy dose of engineering judgement. The key to full adoption of ABC in the United Stated hinged on the development of engineering resources that can be used by designers to develop successful designs. Many resources are now available, with the most important being the 2018 AASHTO LRFD Guide Specifications for ABC. This keynote address will focus on the development of the resources that are currently available to practicing engineers.

PRESENTATION TITLE: BONE RIVER BRIDGE, AN OBSCURE DATA POINT WORTH CONSIDERING Presenter: Patrick Gallagher Date: Thursday, December 9 Time: 1:35 p.m. - 1:55 p.m.

Segment: ABC Case Studies Presentation Description: Along the shores of Willapa Bay in Southwest Washington State sits a bridge designed to consist of precast substructure elements in a very high seismic zone. While the bridge does not include precast elements in the final construction, it serves as a foreshadow of things to come, and a test case for just how ready the marketplace was to embrace precast substructure elements at the time of its construction. For those of us in the

Accelerated Bridge Construction world, it seems clear that ABC is making a turn from crazy to commonplace, and that there are opportunities everywhere to pick up the pace of bridge construction. But that was not always the case. This early design reflects the mood of its day and was a bit ahead of its time. The Bone River Bridge site was an ideal site for a rural application of precast substructure elements. The bridge rests on large and deep drilled shafts. The ground below the bridge is in a tidal zone, it’s in an environmentally sensitive location, and the site is known to contain historical artifacts. Minimal disruption of the site was a concern, and precast substructure elements would have minimized the environmental and archaeological impacts. It also sits along a lonely two-lane highway connecting distant coastal communities with long detours and a local traffic pattern very dependent upon the function of a bridge at this site. With the newness of ABC at the time, region planners were hesitant to require the substructure be precast. So as a means to test the waters, both precast and cast-in-place alternatives were presented in the bid plans. As a result, provisions for the larger environmental impact of the two options were allowed and the contractor chose to go with what was comfortable to them: the cast-in-place option. Construction methods were investigated, and industry feedback was applied to this design to make precast substructures as appealing as they could be to contractors, giving the precast option the best chance for selection. But not being selected doesn’t mean this project was not a success. The Bone River Bridge design serves as one data point of many in a vast collection of test cases, validating the benefits of ABC and precast substructures. Often times a look at what was not perceived as successful can further advance our goals if we study them carefully. And this presentation would do that. This presentation will demonstrate the unique features of this site and lay out the case for precast substructures. It will explain how ABC was researched, considered, and applied, and how it’s seismic performance would compare to its cast-in-place counterpart. It will also take a minute to reflect on how industry changes in the past manifested themselves back then, and compare the approach employed to the Bone River Bridge to those earlier times. And, it will build upon the information presented at the 2021 International Bridge Conference, focusing entirely on the Bone River Bridge project.

PRESENTATION TITLE: INNOVATIVE DESIGN AND ACCELERATED CONSTRUCTION TECHNIQUES FOR THE LONG ISLAND RAIL ROAD EXPANSION PROJECT Presenter: Pak Ki So Date: Thursday, December 9 Time: 2:00 p.m. - 2:20 p.m.

Segment: ABC Case Studies Presentation Description: The Long Island Rail Road (LIRR) is currently the busiest commuter railroad in North America and carries approximately 304,000 customers each weekday on roughly 750 trains. The entire LIRR system is made up of over 700 miles of track on eleven branches and provides vital access for Long Island and Queens residents into Manhattan and Brooklyn. The LIRR Expansion Project upgrades an extremely heavily utilized 9.8 mile two-track Main Line segment that runs between Floral Park and Hicksville in Long Island, NY. This segment alone accounts for approximately 41 percent of the entire LIRR daily ridership. The Project’s main goal is to add a third track to the Main Line which will substantially improve operations by adding track capacity and reduce delays. In order to add a third track, extensive modification to the infrastructure had to be done within that 9.8 mile corridor. Eight existing railroad bridges had to see significant retrofit so that those bridges could support the new third track.

Also, a major goal of the project was to improve public safety by eliminating at-grade crossings. Of the eight existing at-grade crossings eliminated by the Project, six of these crossings are being replaced by six railroad and five vehicle supporting bridges over newly depressed roadways (the remaining 2 grade crossings are to be closed to vehicular traffic). With such immense modification to infrastructure, the Design Build Team had to use extremely innovative accelerated construction techniques to reduce impact to LIRR operations and to the public. Typically, bridges over depressed roadways have been installed utilizing temporary track support structures installed during single track outages to allow for the construction of the abutments and then a weekend double track outage to install the superstructure. For the six crossings being replaced with new bridges and depressed roadways, the Design Build Team brainstormed to select a structure type and a construction procedure to greatly improve on this and reduce construction time. An innovative procedure was used where a bridge

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is built on a U-shaped concrete substructure adjacent to the final location and then laterally pushed into position with hydraulic jacks. Such a procedure is typically done when the proposed bridge is in an open space. In this Project, the Design Build team showed that this could also be done in a tight urban space where there were many properties and residences close to the proposed work. A completed bridge structure was laterally pushed into its final position quickly and precisely within several hours. This method chosen will result in an elimination of approximately 12 single track outages and is done without the need for approximately 20 to 22 costly temporary track support structures.

Besides the new bridges at eliminated grade crossings, the modification of the eight existing railroad bridges are all individually done during weekend double track outages. Each of those weekends see a tremendous amount of work where a superstructure is partially or completely removed and a new bridge is installed on top of a modified substructure.

PRESENTATION TITLE: SUPERSTRUCTURE MODULES AT BRIDGES 3-155 N&S OVER BROADKILL RIVER, SUSSEX COUNTY, DE Presenter: William A. Geschrei Date: Thursday, December 9 Time: 2:20 p.m. - 2:40 p.m.

Segment: ABC Case Studies Presentation Description: The “Rehabilitation of Bridges 3-155 N&S” project features the superstructure replacement of two parallel five span steel beam bridges owned by the Delaware Department of Transportation (DelDOT) along the SR 1 corridor in Sussex County, Delaware. SR 1 is the main north-south divided highway in Delaware, extending between Wilmington, Delaware and the Delaware Beach Resort areas. These bridges are located approximately 30 miles south of the Dover Air Force Base and 10 miles north of Rehoboth Beach, Delaware.

Accelerated Bridge Construction (ABC) considerations were of paramount importance as local project constraints dictated a condensed construction schedule from October to March to minimize adverse impacts of traffic travelling back and forth from the popular ocean resort communities. Constructed in 1967

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along a curved alignment, each bridge provides a 28’-0” clear roadway width for two lanes of traffic. DelDOT’s Bridge Maintenance System identified major repairs will be required to extend the useful service life of the bridges. A hands-on structural inspection was performed in 2019 including a deck testing program and an underwater inspection. The decks and failing concrete overlays exhibited numerous locations of delaminated concrete, spalls, and failing asphalt patches.

The beam ends generally exhibited areas of corrosion, delaminating steel, and non-functioning steel bearings. A deck replacement utilizing precast concrete deck panels was originally intended for this project. Citing the costs of jacking for bearing replacements, steel repairs, and steel cleaning and painting, in addition to the complexities of replacing bearings while maintaining the vertical bridge profile, a superstructure replacement utilizing prefabricated superstructure modules was investigated. Conceptual design and research that included discussions with precast concrete fabricators, steel fabricators, CPM schedulers, and construction managers concluded that the existing superstructures could be replaced within the same schedule and at a cost comparable to the originally intended deck replacement. Additional measures incorporated into the project to meet the condensed construction schedule include precast concrete traffic barriers constructed integrally with the modules, precast concrete approach slab components with integral concrete traffic barriers, use of rapid strength gaining ultra-high performance concrete (UHPC) to close the longitudinal joints between adjacent modules, and a rapid setting Polyester Polymer Concrete (PPC) overlay.

The northbound bridge will be closed with the southbound bridge carrying two-way traffic. This scenario is flipped to complete the southbound bridge work.

Consequently, median crossovers were constructed under a separate construction contract in December 2020. This rehabilitation project will result in the elimination of all but one transverse roadway joint on each bridge through the use of UHPC link slabs, protection of the bridge decks with the PPC overlay, and an improved and safer clear roadway width of 33’-4”. Additional repairs include substructure concrete repair, replacement of the existing pier pile jackets, and repairs to the existing slope protection. This work will significantly reduce future maintenance costs (and future traffic impacts) and significantly increase the remaining service life of the bridges. Construction of the northbound bridge is scheduled to begin in 2021 with all project work completed by the end of March 2022.

PRESENTATION TITLE: RECONSTRUCTION OF MAIN STREET OVERCROSSING Presenter: Kumar K. Ghosh Date: Thursday, December 9 Time: 2:40 p.m. - 3:00 p.m.

Segment: ABC Case Studies Presentation Description: With hours of delay occurring daily on the Interstate 5 (I-5) barrier-separated HOV system through the heart of Orange County, the Orange County Transportation Authority (OCTA) realized the need to improve the 3-mile segment between bottlenecks at the State Route 55 (SR 55) and the State Route 57 (SR 57) freeway-to-freeway interchanges. The removal of the HOV dropramp bridge was an important element of the project given the limited availability and high cost of right-of-way (ROW) in Southern California. The project was innovatively designed and constructed within the existing freeway footprint to utilize the space previously taken by the HOV dropramp, so that no additional ROW acquisition or relocation of third-party utilities was required. Traffic analysis of the HOV drop ramp bridge indicated that it was under-utilized and had a higher-than-usual accident rate. By removing this facility, the HOV corridor is expected to have a reduced potential for traffic accidents, while also minimizing the ROW footprint and optimizing the traffic circulation. The Main Street OC consists of two 5-span, 873-ft Cast-in-Place Post-Tensioned (CIP-PT) structures connected through deck closure. Each of the structures has two frames with variable span configurations at a very high skew (65 degrees) to accommodate the lane layouts over the I-5 mainline traffic. The widths and girder layouts of the two structures are also variable since three ramp structures to/from I-5 framed into the main bridge. The Edgewood Drive HOV ramp was one of these ramp structures that was removed as part of this project. The removal of this ramp structure resulted in a reduction of load to the Main Street OC transferred at Span 5 hinge. After the ramp removal, a portion of the Main Street OC had to be reconstructed to maintain the sidewalk and outside barrier. The result added back a portion of the load from the removed ramp. Due to the higher load from the ramp structure, the outside girders of Main Street OC have a different PT

profile than the interior girders. A staged construction analysis using a full 3-D grillage model of the superstructure was necessary to ensure that the change in structural stresses to the Main Street OC over the various stages of ramp removal and bridge reconstruction were within design limits. A major risk element on the project was the ramp bridge demolition, which required full freeway closures. The TYLI design team collaborated with OCTA and Caltrans design and construction staff in a workshop to present the demolition options. This allowed all the team members to express any concerns and come to a consensus on the selected option. The demolition was ultimately completed during a single weekend full freeway closure, reducing risks, and minimizing impacts to the public that would have occurred if a series of shorter night closures were used. The entire ramp over the freeway was removed overnight based on the designed staged demolition plan.

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PRESENTATION TITLE: NCHRP SOLVING TRANSPORTATION CHALLENGES THROUGH RESEARCH

PRESENTATION TITLE: THIXOTROPIC UHPC OVERL AYS BOND PERFORMANCE: A FHWA RESEARCH UPDATE

Presenter (Keynote): Waseem Dekelbab Date: Thursday, December 9 Time: 3:05 p.m. - 3:35 p.m.

Segment: ABC Research and Case Studies

Presenter: Michelle Helsel Date: Thursday, December 9 Time: 3:35 p.m. - 3:55 p.m.

Segment: ABC Research and Case Studies

Presentation Description: Because of the dynamic nature of U.S. transportation systems, state departments of transportation (DOTs) are always facing new, usually complex challenges. In response, the states turn to the National Cooperative Highway Research Program (NCHRP) to focus some of the best minds in transportation on collaborative research that leads to far-reaching solutions. NCHRP focuses on the nation’s critical transportation issues, producing research findings that guide practice in U.S. transportation and that result in safer roads, reliable travel, and substantial savings of taxpayer dollars. Since its inception in 1962, NCHRP, which is administered by the Transportation Research Board of the National Academy of Sciences, Engineering, and Medicine, has delivered research findings and recommendations that make a difference. NCHRP has played a key role in developing essential tools of the trade—for example, the Highway Capacity Manual, American Association of State Highway and Transportation Officials’ (AASHTO) bridge specifications, and AASHTO’s pavement design guide— that continue to provide the United States with the world’s best design and construction practices. This presentation highlights research conducted under NCHRP and funded by AASHTO to help bridge owners, fabricators, and contractors successfully use prefabricated bridge elements and systems and bridge moves for accelerated bridge construction.

Presentation Description: This presentation provides a brief overview of the ongoing research being completed at the Federal Highway Administration (FHWA) Turner Fairbanks Highway Research Center (TFHRC). Given the rapid deterioration of bridge decks observed in recent years, our research examines the use of thixotropic ultra-high performance concrete (UHPC) overlay materials as a rehabilitation method for bridge decks. Specifically, we focus on the bond performance of this thixotropic UHPC by looking at three different study areas: 1) UHPC overlay to concrete substrate bond, 2) UHPC to UHPC bond at cold joints, and 3) composite action of the UHPC overlay under monotonic and cyclic loading. Preliminary results showed that, as previously investigated and concluded, bond strength is greatly affected by the surface preparation at the interface between the hardened concrete and newly placed UHPC. Different surface preparation techniques determined the quality of the interfacial bond, mainly driven by two aspects: 1) level of consolidation of the fresh material, and 2) level of microcracking in the hardened material. Meanwhile, surface preparation has minimal effects on the bond between hardened and fresh UHPC. Finally, monotonic and cyclic structural tests of UHPC overlays cast over conventional concrete substrates demonstrated that composite action is provided by the UHPC and conventional concrete without overlay delamination, while showing that the structural response is predictable using momentcurvature analysis.

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PRESENTATION TITLE: BRIDGE DESIGN WITH UHPC AND A PATH FORWARD

• flexural design at the service and ultimate limit states

Presenter (Keynote): Benjamin A. Graybeal Date: Friday, December 10 Time: 9:00 a.m. - 9:50 a.m.

Segment: UHPC Based Innovations and Solutions

• beam shear design at the service and ultimate limit states

Presentation Description: We know how to produce ultra-high performance concrete. We know how to fabricate components with UHPC. Soon, we can expect to have standardized structural design processes relevant to UHPC. Bridges and bridge components in the U.S. are designed according to the AASHTO Load and Resistance Factor Design Bridge Design Specifications (LRFD BDS). The strong and growing interest in the use of UHPC for primary bridge components has led AASHTO’s Concrete Bridge Design Committee to begin addressing the need for UHPC-focused design guidance. Specifically, the committee is considering the balloting and publication of a proposed Guide Specification for Structural Design with UHPC. This document, developed by a team of researchers at the U.S. Department of Transportation’s Federal Highway Administration, parallels existing bridge design processes while integrating additions and revisions relevant to the behaviors of UHPC. Largely based on the fundamental mechanical behaviors of UHPC-class materials, the provisions in the guide specification allow a designer to define required UHPC properties according to standardized tests then to apply those properties within structural member behavioral models. The behavioral models rely on both stress and strain behaviors of the included structural materials, leading to predictions of member response at relevant limit states. Through this design process, designers can engage the unique mechanical behaviors of UHPC to create novel solutions that are architecturally pleasing, structurally optimized, and constructible.

• steel reinforcement detailing

• interface shear design • creep, shrinkage, and prestress loss predictions

The presentation will introduce the proposed UHPC guide specification, offering insight into the concepts and details of the design methodology. Key aspects include: • UHPC tension and compression mechanical models • stress and strain limits for UHPC components

• durability considerations Whether being used for optimized pretensioned girders; durable, costeffective piles; resilient deck elements; or long-lasting bridge preservation and rehabilitation actions, UHPC is creating opportunities for innovators to develop compelling solutions that address the needs of today’s infrastructure owners.

PRESENTATION TITLE: UHPC REPAIR OF STEEL COLUMNS IN THE WALNUT TUNNEL IN PHILADELPHIA Presenter: Michael D. McDonagh Date: Friday, December 10 Time: 9:50 a.m. - 10:10 a.m.

Segment: UHPC Based Innovations and Solutions Presentation Description: In 2020, the Pennsylvania Department of Transportation (PennDOT) District 6-0 in conjunction with Southeastern Pennsylvania Transportation Authority (SEPTA) rehabilitated the PennDOT bridge structure located within SEPTA’s Walnut Tunnel, which carries the airport regional rail line. The bridge/tunnel includes a series of steel columns supporting the tunnel ceiling that were experiencing advanced corrosion and section loss. PennDOT and their designer, Alfred Benesch & Company, decided to replace the existing concrete pedestals and encase the deteriorated steel columns with ultra-high performance concrete (UHPC), in the first use of UHPC for steel column repair in a North American transportation infrastructure. The UHPC provides additional compressive and buckling resistance to compensate for the columns’ section loss, and also protects the steel columns against any future corrosion due to its extremely low permeability. The contractor selected Steelike® UHPC, which provided several unique placement advantages.

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Steelike’s standard practice of mixing in ready-mix trucks allowed the UHPC to be mixed above the tunnel and away from work areas. The material was then discharged directly from the trucks above the repair locations into a tremie line.

The large mixing capacity of the trucks provided a continuous flow of material, enough to fill multiple column repair forms per batch.

PRESENTATION TITLE: INNOVATIVE UHPC MIXING AND PLACING TECHNIQUES FOR REPAIR OF THREE ILLINOIS BRIDGES Presenter: Michael D. McDonagh Date: Friday, December 10 Time: 10:10 a.m. - 10:30 a.m.

Segment: UHPC Based Innovations and Solutions Presentation Description: Kane County, Illinois, repaired three bridges in 2020 using ultra-high performance concrete (UHPC). The UHPC supplier, Steelike, introduced multiple innovative techniques that allowed the contractor to complete the projects in less time and for less cost. Innovative mixing techniques included mixing the UHPC in ready-mix trucks, which allowed the UHPC placements to proceed faster than typical rates with traditional UHPC mixers. Additionally, the UHPC was mixed offsite for one project with over 1.5 hours between mixing and final discharge, providing greater flexibility for mixing location and placement timing. Innovative placement techniques included directly discharging the UHPC from the ready-mix truck onto the bridge deck in front of the screed for a UHPC overlay. This eliminated buggies commonly used to transport UHPC and also reduced labor and UHPC waste. The UHPC overlay was also successfully cured without plastic sheeting, eliminating the risk of deep impressions in the overlay surface from the sheeting or sheeting hold downs that have been seen on other projects. Additional innovative placement techniques for two projects repairing keyways between adjacent precast beams included flush forming the new UHPC connections. Flush forming was successfully performed without trapping air in the top layer – the reason why deck-level UHPC connections typically require overfilling and grinding – due to a unique process pioneered by Steelike.

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PRESENTATION TITLE: ABC TRENDS AND PRACTICES IN SEISMIC REGIONS Presenter (Keynote): Bijan Khaleghi Date: Friday, December 10 Time: 10:35 a.m. - 11:05 a.m.

Segment: ABC Seismic Solutions Presentation Description: Accelerated bridge construction (ABC) is the preferred method of construction multi-span bridges in seismic regions. ABC jointless bridges is are advantageous in seismic resiliency, safety, sustainability, improved long-term performance, durability and lower maintenance life-cycle costs. Other advantages include improved structural integrity, reliability and redundancy, improved long-term serviceability, improved riding surface, reduced initial cost, and improved aesthetics.

Developing connections that can accommodate inelastic cyclic deformations and are readily constructible is the primary challenge for ABC in seismic regions.

This presentation focuses on the seismic performance bridge columns and piers meeting the seismic hazard evaluations SEE and FEE requirement using a combination of innovative designs and materials such as super-elastic materials, self-centering capability, or other means to achieve seismic resiliency during earthquake and post-earthquake functionality. This presentation will attempt to capture the state-of-practice of ABC bridges in seismic regions from research to implementation focusing on the design, detailing and application of innovative materials for improved performance, durability, and life-cycle costs.

PRESENTATION TITLE: A LOW-DAMAGE DISSIPATIVE CONTROLLED ROCKING COLUMN SOLUTION FOR ACCELERATED BRIDGE CONSTRUCTION (ABC) IN SEISMIC REGIONS Presenter: Sabina Piras Date: Friday, December 10 Time: 11:05 a.m. - 11:25 a.m.

Segment: ABC Seismic Solutions Presentation Description: A dissipative controlled rocking (DCR) solution for

precast bridge columns is presented. The DCR connection is a low-damage system that replaces the plastic hinge mechanism that would otherwise form in castin-place columns. The aim of the DCR connection is to minimize and potentially eliminate the repair time and costs to a bridge after an earthquake. A DCR system combines unbonded posttensioning and replaceable dissipaters to provide selfcentering and energy absorption capabilities for the bridge bent, respectively.

When developing the details for the DCR connection, particular emphasis was made on utilizing conventional construction materials and forms for the low-damage bent that yields a similar construction cost as a monolithic joint. Nevertheless, the proposed DCR connection can be easily and quickly repaired or replaced after a significant seismic event. The performance of the bent was compared against a benchmark structure with an emulative connection type that resembles a monolithic cast-in-place joint. Results from testing suggest greater performance of the low-damage DCR column.

PRESENTATION TITLE: TECHNOLOGY DEVELOPMENT OF CONCRETE FILLED STEEL TUBULAR COMPOSITE HIGH PIER AND ITS APPLICATION IN STRONG EARTHQUAKE AREA Presenter: Ge Wang Date: Friday, December 10 Time: 11:25 a.m. - 11:45 a.m.

Segment: ABC Seismic Solutions Presentation Description: Due to the extension of highways and railroads into the mountainous regions of western China and the routes running through high mountains and valleys, bridge construction inevitably results in ultra-high piers, while these areas are in the active zones of the earth’s crustal plate, with high seismic intensity and fragile ecological environment. Therefore, how to build bridges with piers over 100 meters in high-seismic-intensity areas is a difficult problem for bridge engineers. This report introduces a concrete-filled steel tube lattice pier structure and its related construction technology, taking the world’s highest pier under construction, the Jinyang River Bridge in Jinyang County, Sichuan Province (a continuous rigid-frame bridge with a maximum pier

height of 196 meters and a seismic precautionary intensity of 7.7 degrees in the measured area), as an example. The introduced structure has high strength and high flexibility, is light weight, and shas trong self-erection ability, which solves the formation and construction problems of ultra-high piers.

Through the application of this technology, the Labajin Grand Bridge at Ya’anXichang Expressway with a pier height of 182.5 meters and the Heshegou Bridge with a pier height of 157 meters have been completed. These two bridges are now operating well, though they experienced the test of the 4.20 Lushan 7.0-degree earthquake. This technology is also applied to the under-construction Huoshaopeng Bridge at Yibin-Jinyang Expressway with a pier height of 127 meters and a seismic precautionary intensity of 8.0 degrees, and the Kahaluo Bridge with a pier height of 195 meters and a seismic precautionary intensity of 8.0 degrees.

PRESENTATION TITLE: INVESTIGATION AND VERIFICATION ON SEISMIC PERFORMANCES OF PRECAST BRIDGE COLUMNS WITH NEW TYPE OF PEDESTAL CONNECTIONS Presenter: Jiyan Zhang Date: Friday, December 10 Time: 11:45 a.m. - 12:05 p.m.

Segment: ABC Seismic Solutions Presentation Description: Accelerated bridge construction has gained increasing popularity in the past decades, and grouted splice sleeves have been widely used in connections between prefabricated reinforced concrete bridge columns in China. Aiming at the technical defects of grouted sleeves, a new type of connecting scheme with a prefabricated connecting pedestal constructed at columnfooting joints has been proposed. In the new connections, embedded corrugated galvanized steel ducts were placed in the pedestal to create connectivity with reinforcing bars in the cast-in-place footing. The present study investigates the seismic performance of precast columns with this new type of connection and verifies the precast piers used in the real structure. A quasi-static cyclic test was conducted for two 1/3-scale specimens with rectangular section and circular section, respectively, while the two specimens were of the same height and cap

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design based on practical applications of urban viaducts in China. During the whole loading process, the pedestals and the reinforced anchorages basically kept intact and bending failure occurred in both specimens. Experimental results showed that the specimen with rectangular section had displacement ductility coefficient of 5.96 while the circular section specimen had the value of 6.09.

The maximum reinforcement strains of the two specimens occurred both on the top of the pedestals and they were the main plastic hinge damage regions. In spite of the different cross section, the circular section specimen showed similar energy dissipation, residual displacement and stiffness degradation trends to the rectangular section specimen. According to the results of displacement ductility, hysteretic behaviors, energy dissipations and damage modes, seismic performances of columns applying the new type of connection were verified and have shown similar results to the cast-in-place reference columns.

PRESENTATION TITLE: CALTRANS ACCELERATED BRIDGE CONSTRUCTION MANUAL Presenter (Keynote): Dorie E. Mellon and Jay Holombo Date: Friday, December 10 Time: 12:55 p.m. - 1:25 p.m.

Segment: ABC Seismic Solutions Presentation Description: Caltrans and T.Y. Lin International (TYLI) have developed an Accelerated Bridge Construction (ABC) Manual for California. This is a comprehensive manual providing guidance on planning, design and construction of ABC projects. Manual development tasks included researching and synthesizing ABC state-of-the-practice, industry outreach, preparing manual drafts, responding to comments and finalizing the document for publication. An initial draft was distributed to the industry in March for review and comment, and the ABC manual is scheduled for publication in August of 2021. The purpose of the manual is to provide planners and engineers with a basic understanding of the different ABC methods available, help guide project specific selection of ABC methods, and encourage the use of ABC methods. The Manual supports efficient and consistent ABC practice in California by providing guidance for the evaluation, planning,

52 | PRESENTATION DESCRIPTIONS

design, construction, and administration of projects using ABC design methods and materials. At the planning phase, the ABC Manual has guidance and tools for determining whether ABC should be used over conventional bridge construction.

If ABC is selected, the manual provides guidance on determining the ABC method that is most appropriate for the project based on the goals, opportunities, and constraints of the project. At the design phase, the ABC manual provides detailed guidance on the design of projects using move-in methods, where entire bridge span(s) are constructed and then moved into place using lateral slide, SelfPropelled Modular Transporter (SPMT), large crane, or longitudinal launch systems.

Detailed guidance is also provided on ABC using prefabricated bridge elements (PBE) rapidly assembled in place. Closure and connection materials, such as nonshrink grout, rapid strength concrete (RSC) and ultra-high performance (UHPC) are discussed. At the construction phase, the manual provides guidance on construction aspects that are unique to ABC, including roles and responsibilities, submittal requirements, layout, tolerances, mock-ups and communication protocols. The manual appendices provide checklists for the planning, design and construction of PBE, SPMT and lateral slide projects as well as a checklist and information on the effective implementation of UHPC. Implementation of the Caltrans ABC Manual is in alignment with Caltrans Strategic Plan by placing a priority on safety and innovation to provide a reliable transportation network while reducing construction related impacts.

PRESENTATION TITLE: APPLICATION OF INTELLIGENT MANUFACTURING IN THE MODERN PREFABRICATION BEAM YARD Presenter: Zhang Al Min Date: Friday, December 10 Time: 1:25 p.m. - 1:45 p.m.

Segment: 3D Printing and Automation in ABC Presentation Description: The “Smart Prefabrication Yard” of ShengzhenZhongshan Link is responsible for the prefabrication of 636 slices, 40m concrete smallbox girders and the 155 slices, 60m concrete big-box girders (the heaviest weight is 3,200 tons). Prefabrication yard’s aim is “visualization

of production process, standardization of construction process, digital business management, intelligence of equipment management,” also taking “the improvement of quality efficiency, reduction of the source and the trace” as the breakthrough point. It studies and applies some technologies, such as: automatic processing of steel bars, intelligence control hydraulic template, intelligent concrete production, cast concrete, maintenance, stretch-draw and mud jacking and other information and intelligent technologies in the whole process. It is meaningful to improve management level, project quality and enhance production efficiency, as well as build smart construction site.

PRESENTATION TITLE: 3D-PRINITNG OF UHPC SHELLS FOR BRIDGE ELEMENT USING SECTION PRINTING Presenter: Atorod Azizinamini Date: Friday, December 10 Time: 1:50 p.m. - 2:10 p.m.

Segment: 3D Printing and Automation in ABC Presentation Description: Unlike many industries such as electronics, automotive, and aerospace, the construction industry is behind on implementing robotics and automated construction techniques. Automated construction can lead to an expansion in prefabrication technology.

This presentation discusses the development of UHPC shells which are prefabricated using 3D-printing. The automated UHPC shells are suitable for most bridge elements such as bridge girders, cap beams, columns and foundations. In this presentation, a new concept of section printing will be presented allowing the UHPC shell to be printed continuously, therefore eliminating joints between layers.

PRESENTATION TITLE: CONSTRUCTION OF WENCHUAN KEKU BRIDGE Presenter: Caizhi Sun Date: Friday, December 10 Time: 2:10 p.m. - 2:30 p.m.

Segment: 3D Printing and Automation in ABC Presentation Description: About 33% of land in China exceeds 2000 meters from sea level. Construction in these regions usually suffers from the following inconveniences: short effective construction time, scarcity of raw materials, long distance transportation of materials, and difficulties in transporting and installing large-scale equipment in site. A large number of construction plans have been scheduled in China, among which at least 30% of the total mileages are for medium-span bridges. Neither traditional RC bridge nor steel beam bridge is an optimal choice for targeted mountainous areas. The Wenchuan Keku Bridge in Wenchuan County runs along a river valley of 50m bottom width with staggered houses and roads. Due to the low temperature in winter, the effective construction period is only 8 months per year, which is typical in China’s mountain areas. Engineers invented a medium span full CFST (Concrete Filled Steel Tube) truss bridge with the design goals to achieve maximum fabrication percentage in factory, convenient on-site installation, and resource saving. The Wenchuan Keku Bridge with a design speed of 80km/h has a layout of two-way four lanes, 24.5m width, 40m span, and 6431m total length. CFST materials are used in girders and piers.

The girder is combined with two longitudinal pre-stressed CFST trusses and steelconcrete composite deck, and the CFST pier is connected to the RC pile foundation by a strengthened steel-concrete composite joint. Benefited from the new ABC technology with highly industrialized manufacture and whole span erection with no form works, the effective construction time at site was only 16 months to finish the 6431m bridge. The Wenchuan Keku Bridge not only serves as a model for ABC projects to meet the huge demand of medium span bridges in China’s mountainous areas, but also may provide a reference for bridge constructions around the world.

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PRESENTATION TITLE: ACCELERATION VERSUS BEAUTY? THE ROLE OF PREFABRICATION IN BRIDGE CONSTRUCTION Presenter (Keynote): Mike Schlaich Date: Friday, December 10 Time: 2:30 p.m. - 3:00 p.m.

Presentation Description: Our bridges should be safe, economic, and beautiful. Economy is closely connected to speed of construction and thus to prefabrication. Especially if new materials and new ways of design, fabrication and erection are looked at our (prefabricated) bridges can become more resource efficient also. Recent research in the field of bridge design in Germany and a range of unconventional prefabricated bridges will be presented here. The range bridges to presented spans from applications in India to Germany, from carbon-posttensioned concrete elements to doubly-curved stainless shells. The issue of sustainability, climate-change and new mobilities have certainly caused a paradigm-change also in the field of bridge design and shed a new light on how we work. In the end, however, bridges should increase our quality of life, they should contribute to what in Germany is called “Baukultur”. This is what this lecture will be about.

PRESENTATION TITLE: BRIDGE ERECTING EQUIPMENT IN CHINA Presenter: Hu Xu Dong Date: Friday, December 10 Time: 3:05 p.m. - 3:25 p.m.

Presentation Description: The box girder bridge erecting machine is a walking type bridge erecting machine, which adopts a gantry double girder three-leg structure. Walking type cantilever through hole, tail beam feeding, dragging beam, span one-hole beam erection, flexible operation, suitable for the erection of 900 ton precast concrete box girder of railway passenger dedicated line.

JQ900B box girder bridge erecting machine is a full tire walking type bridge erecting machine, which adopts a gantry type double girder three-leg structure.

54 | PRESENTATION DESCRIPTIONS

The No.3 column adopts the tire running cantilever through the hole, tail beam feeding, dragging beam, span one-hole beam erection, which has high operation efficiency. In addition, the bridge erecting machine does not need to be disassembled, and directly transfers between bridges through its own running, which is suitable for the erection of 900 ton precast concrete box girder of railway passenger dedicated line. The JQS1000 type bridge erecting machine is a wheel rail walking type bridge erecting machine, which adopts a gantry type double girder multi-leg structure. The rear outrigger adopts wheel rail running, cantilever through hole, tail beam feeding, dragging beam, span one hole beam erection, which is suitable for the erection of 20m, 24m, 32m, 40m standard of 250-350km/h Railway Passenger Dedicated Line and non-standard double track full hole precast concrete box girder (1000t grade and below) between 20M40M after partial transformation. It can realize the design speed of 350km/h and 250km / h Railway into the tunnel - 20m, out of the tunnel 7m beam. JQSS900B bridge erecting machine is a walking tunnel bridge erecting machine, which is an upgraded version of jqss900 bridge erecting machine. The O-type middle outrigger is added in the middle of the span of jqss900 bridge erecting machine, and the rear Ctype outrigger is added in the tail. At the same time, the two-stage telescopic middle outrigger and backward turning outrigger of the original bridge erecting machine are retained. When the bridge is erected outside the tunnel, the bridge erector uses the front outrigger, O-type middle outrigger and rear C-leg to support the single span girder, so as to improve the construction efficiency.

When the bridge erecting machine enters and exits the tunnel and bridges in the tunnel, the original double span beam erecting structure of the bridge erecting machine shall be restored. It is applicable to the erection construction of nonstandard double track full hole precast concrete box girder (900 tons) in the area connected with bridge and tunnel, which is 20m, 24m, 32m standard and 20m ~ 32m between the speed of 200 ~ 350km / h Railway Passenger Dedicated Line.

It can realize the erection of the tunnel entrance and exit and the beam in the tunnel by cooperating with the beam transporting vehicle through the tunnel.

PRESENTATION TITLE: ABC-US EXPERIENCE FROM CONSULTANT VIEWPOINT AND OPPORTUNITIES Presenter (Keynote): Bala Sivakumar Date: Friday, December 10 Time: 3:25 p.m. - 3:55 p.m.

Presentation Description: Implementation in the U.S. has been significantly advanced due to the leadership of state DOTs in partnership with federal, academic and industry partners. Bridge design consultants have been at the forefront of implementing ABC as ABC has evolved over the past 15 years from a specialized technique applied by contractors to an important delivery method in the toolbox of bridge owners. Initial impediments to using ABC including the lack of national design codes and construction specifications, owner’s policy guidance for ABC use, and local contractor and fabricator experience have been greatly alleviated. Many state DOTs have incorporated ABC policy guidelines and design standards in their Bridge Design Manuals. Consultants have a greater array of tools and technologies at their disposal for ABC design. In an age of limited resources, challenges still remain with how we justify ABC techniques compared to conventional methods. ABC training opportunities to better educate the design and construction community also need to be a focus. This presentation will provide a consultant’s viewpoint of the practice of ABC in the U.S.

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ULTRA HIGH PERFORMANCE CONCRETE (UHPC) WORKSHOP Virtual Workshop with Live Demonstration of Mixing UHPC December 9-10, 2021

56 | WORKSHOPS

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WORKSHOP AGENDA ABC-UTC NON-PROPRIETARY UHPC WORKSHOP- SESSION 1 Session 1 – December 9: Properties of ABC-UTC Non-Proprietary UHPC and Lessons Learned The first half of the workshop will introduce ultra-high performance concrete, identify why locally produced non-proprietary mix designs are an important option for Accelerated Bridge Construction (ABC), provide a summary of the work done to develop the ABC-UTC non-proprietary UHPC mix, and include presentations focused on non-proprietary UHPC developed at institutions outside of the ABC-UTC. Time

Title

Presenter

4:15 p.m. – 4:25 p.m.

Overview of ABC-UTC Efforts for Development of ABC-UTC Non-Proprietary UHPC

Atorod Azizinamini, Director, ABC-UTC

4:25 p.m. – 4:55 p.m.

Introduction and Basic Properties

Royce Floyd, University of Oklahoma

4:55 p.m. – 5:15 p.m.

Performance of ABC-UTC Non-Proprietary UHPC, Using South Florida Materials

David Garber, Florida International University

5:15 p.m. – 5:35 p.m.

Shear Strength of ABC-UTC Non-Proprietary UHPC

John Stanton and Paolo Calvi, University of Washington

5:35 p.m. – 5:55 p.m.

Performance of ABC-UTC Non-Proprietary UHPC Deck Panel Joints –

Mohamed Moustafa, University of Nevada Reno

5:55 p.m. – 6:15 p.m.

Development of ABC-UTC Non-Proprietary UHPC Using Iowa Materials

Iowa State University

6:15 p.m. – 6:30 p.m.

Summary of ABC-UTC Collaborative Effort

Royce Floyd, University of Oklahoma

This presentation will provide a summary of the lessons learned about utilizing UHPC made with local materials from different parts of the United States through the ABC-UTC research study.

6:30 p.m. – 7:45 p.m.

Experience with Non-Proprietary UHPC Around the United States

Moderated by Atorod Azizinamini, Director, ABC-UTC

This portion of the workshop provides a brief summary of similar work and efforts on the development of Non-Proprietary UHPC at other institutions.

58 | WORKSHOP AGENDA

Description

•

Kay Wille, Associate Professor, University of Connecticut

•

Micah Hale, Professor, University of Arkansas

•

Sherif El-Tawil, Professor, University of Michigan

•

Barzin Mobasher, Professor Arizona State University

•

George Morcous, Professor, University of Nebraska – Lincoln

•

Craig Newtson, Professor, New Mexico State University

7:45 p.m. – 8:15 p.m.

Panel Discussion: Owners’ and Contractors’ Perspective

Moderated by Atorod Azizinamini, Director, ABC-UTC

All presenters in the workshop will be involved in this panel discussion along with selected DOT and FWHA personnel.

Discussion will begin with questions submitted before the workshop. This session will also provide an opportunity for attendees to ask questions of all presenters.

8:15 p.m. – 8:45 p.m.

Brief overview of Workshop Day 2

Royce Floyd, University of Oklahoma

This presentation will provide a brief overview of the demonstrations that will be conducted on the second day of the workshop, which are focused on mixing UHPC in different locations and testing methods.

ABC-UTC NON-PROPRIETARY UHPC WORKSHOP- SESSION 2 Session 2 – December 10: Practical Demonstration of ABC-UTC Non-Proprietary UHPC The second half of the workshop is aimed at providing hands-on experiences for mixing UHPC. Virtual demonstrations at different ABC-UTC partner universities will be carried out and using cameras at these locations; attendees will have an opportunity to view the steps in mixing UHPC and observe the mixing process in real time.

Time

Title

Presenter

Description

4:15 p.m. – 4:45 p.m.

Explanation of Mixing Procedures and Mixer Requirements

Royce Floyd, University of Oklahoma

This presentation will show the raw materials included in the ABC-UTC Non-Proprietary UHPC mix, discuss procedures required for mixing UHPC, and discuss the effectiveness of different types of commonly available high shear mixers. The presenter will share lessons learned from mixing the same materials at the different ABC-UTC partner institutions.

4:45 p.m. – 5:25 p.m.

Demonstration of Mixing Material at Partner Institutions

David Garber, Florida International University and Royce Floyd, University of Oklahoma

This session will include demonstration of mixing the ABC-UTC Non-Proprietary UHPC mix at two of the partner institutions in real time and by video. A representative from each institution will provide a brief explanation of the slight differences in the mixing procedure required for the given equipment.

5:25 p.m. – 5:40 p.m.

Demonstration of Flow and Discussion of Typical Issues

David Garber, Florida International University

A flow test will be run at each institution where demonstration batches of UHPC were mixed. The moderator will record the individual results and lead a discussion of modifications to the mix required to maintain required flowability.

5:40 p.m. – 6:00 p.m.

Discussion and Demonstration of Testing Methods

Royce Floyd, University of Oklahoma

Differences in testing methods required for hardened properties of UHPC will be discussed and testing of compressive strength and flexural specimens will be demonstrated.

6:00 p.m. – 6:15 p.m.

Summary and Conclusions

Atorod Azizinamini, Director, ABC-UTC 2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 59

CALL FOR ABSTRACTS

Deadline to submit online abstract Feb 25, 2022

2022 ACCELERATED BRIDGE

CONSTRUCTION CONFERENCE Face to Face Conference in Miami Florida Conference: December 7 - 9, 2022 Workshops: December 7, 2022

60 | 2022 CALL FOR ABSTRACTS

ABOUT THE CONFERENCE

PREVIOUS CONFERENCES

In 2022, we will return to having in person conferences in Miami,

The 2014, 2015, 2017 and 2019 ABC Conferences, each were attended

Florida. Because of the pandemic, the Conference Planning Committee

by more than 700 bridge professionals, including more than 150 state

decided to have the 2021 ABC Conference with an international focus

DOT bridge engineers and professionals. For highlights of the 2014,

virtually. The 2022 Accelerated Bridge Construction Conference will be a

2015, 2017 and 2019 ABC Conferences, please visit the following site:

premier bridge engineering conference that is co-sponsored by 30 State

https://abc-utc.fiu.edu/conference/archives/

DOTs, the Federal Highway Administration, and other bridge-related organizations. The 2022 conference will be held on December 7-9, 2022 in Miami, Florida. Several ABC workshops will be held on Wednesday, December 7, one day prior to the conference.

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences | 61

WHO SHOULD ATTEND THE CONFERENCE?

CONFERENCE TOPICS

Bridge design engineers; consultants; fabricators; erectors; precasters;

The conference topics will include, but are not limited to, the following topics:

construction professionals; maintenance engineers; transportation officials; policy makers; marketing professionals; federal, state, and local agencies; city,

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Design considerations

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Contracting

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Substructure

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Erection considerations

county, and regional officials; industry suppliers; academicians; and bridge

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Short-and long-term monitoring

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Cost comparison

professionals with any aspect of bridge design, construction, or maintenance.

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Ultra High Performance Concrete

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Policy, planning, and procurement

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Automation and robotic construction

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Constructability

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Insurance issues

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Seismic issues

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Specifications

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Foundations

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Heavy moves

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Nondestructive testing

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Analysis software

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Service life design

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Budget and financing

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Innovative materials

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Traffic management

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Maintenance

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Visualization tools

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Accelerating retrofitting processes

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Public outreach

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International experiences

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Inspection

Prefabricated elements and systems

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Construction considerations

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Decision-making tools

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Research results

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Proprietary systems and technologies

The focus of the conference will be on Accelerated Bridge Construction, including prefabricated bridge elements, systems, and technologies; policies; contracting methods; and marketing strategies that will facilitate accelerated construction of bridges using various materials and techniques. ABC projects successfully completed in the U.S. and overseas will be presented.

HOW TO SUBMIT ABSTRACT You are invited to submit an abstract of a formal paper to be considered for presentation at the conference. Abstracts are welcomed from bridge design engineers; consultants; fabricators; erectors; precasters; construction professionals; maintenance engineers; transportation officials; policy makers;

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State ABC initiatives

marketing professionals; federal, state, and local agencies; city, county, and

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Fabrication considerations

regional officials; industry suppliers; academicians; and bridge professionals

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Lessons learned

with any aspect of bridge design, construction, or maintenance. Those interested in giving a presentation at the conference should submit a one-page abstract by

EXHIBITORS

Feb 25, 2022. Abstracts must be submitted online at (https://abc-utc.fiu.edu/

For 2022 ABC Conference, we will return to have exhibit in the conference, in the

conference/abstract-submission/)

exhibit hall. Don’t miss the opportunity to exhibit your bridge engineering-related products and services at one of the premier bridge engineering conferences of the year. To reserve your booth, please send an email to Mrs. Saremi at msare001@fiu.edu.

CONTACT INFORMATION For more information, please send an email to msare001@fiu.edu or aazizina@fiu.edu, or call 402-770-6210.

62 | 2022 CALL FOR ABSTRACTS

2021 Virtual Accelerated Bridge Construction Conference: With Emphasis on International Experiences Dec 8-10, 2021 To register for the conference, please use the link below: https://abc-utc.fiu.edu/conference/

The 2022 International ABC Conference (Face-to-Face) Dec 7-9, 2022 Miami, Florida

Accelerated Bridge Construction University Transportation Center (ABC-UTC) Florida International University | Civil and Environmental Engineering Department

abc-utc.fiu.edu 21421_10/2021