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ENGINEERING PORTFOLIO seismic design projects


THE MANETTI BRIDGE The “Ponte Manetti� is a new pedestrian bridge to be built in between the councils of Prato and Poggio a Caiano, in Tuscany (IT), above the Ombrone river. The steel structure will be placed in the same location of the ancient bridge designed by the Engineer Manetti in the early part of the 19th century. Two existing stone arches are the only remaining parts of the old bridge and they will be entirely re-used as components of the new structure. The project was particularly challenging: the design team needed to avoid any horizontal loads transferring (such as the seismic and the wind loads) in order to prevent any collapse of the vertical arches. This aspect was solved providing elastomer discs as supports at the top of the stone arches connected to the tensioned cables of the bridge. Furthermore the discs are capable to allow horizontal movements of the support in both the principal directions on plan.

Working at EN7 srl Year: 2016-2017 Client: Provincia di Prato Location: Prato (IT) Status: Construction Stage

Section and plan

Deformated shape due to wind load

Section across one of the arches

Torsional vibration mode

Rendering of the bridge

Live load deflection

Connections details

In situ test on the arches

The existing stone arches

GRAVEDONA PRIMARY SCHOOL AND GYM During my experience in Italy, I won a public competition for the design of a new educational complex in Gravedona e Uniti (Como). I participated as principal structural engineer with M. Sc. Eng. Andrea Gnudi from EN7 srl. After winning the competition (stage 3 design) we developed the final project for the construction stage. The lateral stability of the building is achieved using reinforced concrete shear walls. In order to allow for long spans, the structural floors are made of a cast in situ flat slab, spanning in both the principal directions on the RC columns. The long span above the gym area is made of precast hollow-core planks, completed with a reinforced concrete top screed, to ensure a diaphragm action at the floor level.

Working at EN7 srl Year: 2016-2017 Client: Comune di Gravedona e Uniti Location: Gravedona e Uniiti (IT) Status: Completed

Structural section

Structural model

First floor structural plan

Rebars layout

Typical reinforcement around openings

Flat slab analysis

U-bars detail on the perimeter

RC detail of a slab

SEISMIC RETROFITTING OF A RESIDENTIAL BUILDING I was involved in this project during my workexperience at EN7 srl, in Bologna. I find this really interesting for several aspects. First of all, it is involved an un-common re-use of an existing industrial building to be converted for a residential usage. A new 3 storey RC frame was litteraly built inside the existing building, totally detached from the existing property. Second, it required several analysis’s on the existing structure, as it is part of a larger complex of buildings. Third, we needed to use different retrofit techniques at the same time in order to obtain the result we would to achieve. I personally was involved in the analysis and checks to be undertaken on the existing structure. According to our analysis, the existing building is now capable to resist a seismic load equal to the 60% of the maximum expected seismic event. A great result, especially if compared to the previous status of the structure.

Working at EN7 srl Year: 2016-2017 Client: Private Location: Bologna (IT) Status: Completed

Structural works at the North elevation

Seimic analysis of the entire block

Local analysis of the typical RC arch

Structural works at the West elevation

In situ compression test on the masonry

In situ shove-test on the masonry

Steel mesh applied as retrofit works on the masonry panels


Working at EN7 srl Year: 2016 Client: Regione Emila Romagna Location: Bologna (IT) Status: Completed

The Nuclear Medicine Department is part of the Ospedale Maggiore complex, one of most important hospital in Emilia Romagna. The building needed extensive structural works in order to ensure a decent level of safety in the case of a seismic event. After undertaking the analysis on the existing structures we started to design the retrofit works for ensure the pre-fixed safety level, according to the client and codes. After several thoughts, we decided to use a composite material made of steel fibres to be applied to the RC members of the building. A large part of our design task was also studying the structural record drawings, to understand the existing structural behaviour and all of its main parts. Structural model of the building

Torsional vibration mode

Structural members to be strenghtened

The steel mesh used for the strenghtening

Steel mesh applied on the typical shear RC wall

Existing shear wall reinforcement

Steel mesh applied on the RC beams (shear and bending strenghtened)

Structural records: foundation layout

Steel mesh applied on the RC beams (shear strenghtened)

The existing building

SEISMIC RETROFITTING OF AN VIENEGARD FACTORY Several buildings were damaged during the 2012 earthquake that occurred in the Modena Area in Italy. EN7 srl was involved in a lot of retrofitting projects for residential, industiral and agricoltural buildings. One of them was the seismic retrofit of a vinegar factory in Bomporto (MO), constructed of a traditional masonry structure according to the typical local schemes. Extensive works were undertaken on the masonry panels, such as on the existing timber floors. The roof was completely renovate, replacing all the existing timber beams and trusses. According to our design, the building is now able to resist a seismic action equal to the 60% of the maximum one expected on the site.

Working at EN7 srl Year: 2016 Client: Private Location: Bomporto (IT) Status: Completed

Building’s elevations: structural works layout

Structural model of the building

Seismic analysis

Floor strengthening

The existing timber floors

Floor strengthening

Works on the typical timber floor

Vault strengthening

Works on the existing vaults

Works on the foundation


Working at EN7 srl Year: 2016 Client: Private Location: Bologna(IT) Status: Construction Stage

This small scale project was developed for adding one story at the top of an existing private hospital in Bologna. The main goal of the project was reducing the structure’s weight at the most, in order to not introduce additional dangerous seismic mass at the top of the existing structure. For that reason, a light weight steel structure was selected. Another challenge was ensuring a safe vertical load path for the additional weight due to the new structure. According to that, all the loads are directly transferred on the existing RC columns of the building, without loading any beams or floors. All the structural members are selected in order to allow a feasible construction method, safely lifting them at the top of the existing property.

Structural model

Structural plan

Deformated shape due to live load

Structural section

Connection details

Building’s elevation: new extension location

Connection details

Building’s elevation: new load path


Working at EN7 srl Year: 2016 Client: Private Location: Bomporto (IT) Status: Completed

This residential building is located in Bomporto (MO) and it is the result of the demolition of an existing structure strongly damaged by the seismic events happened in 2012 in Emilia Romagna. The house and depository areas were consequently re-built using a new RC frame as structural solution. During the design stage we decided to structurally divide the building into two main parts, in order to ensure a regular shape on plan to the structures according to the relevant codes. The lateral stability of the buildings is provided by sway frames in both the principal directions on plan. Both of the roofs are constructed using glue laminated timber beams, in order to reduce the seismic mass at the top due to the dead load.

Structural section

Structural model: unit 1

Structural model: unit 2

Structural plan, first floor

Construction stage

Structural section

Rebars layout

Columns reinforcement

Glulam members for the roof

NEW 2 STOREYS CLT HOUSE Cross laminated timber has a great performance in seismic areas, due to the high strength-weight ratio. In this case, I have used it for the main structure of this new house, built in Bologna countryside. The cross laminated timber panels were manufactured by KLH and quickly assembled on site. Regarding that project I have developed the analysis of the structure and I have checked all the timber to timber connections according to Eurocode 5 and the Italian relevant standards. The building roof is constructed of glue laminated timber members, exposed at the bottom according to the client desire.

Working at EN7 srl Year: 2016 Client: Private Location: Bologna (IT) Status: Completed

Structural plan of the roof

Roof’s truss

Connection detail for the cantilevering joists

Hold-down straps and shear plates

Connection detail at the junction panel - RC raft

Timber roof during construction

Timber roof during construction

Connection detail at the junction panel - RC raft

Connections to the RC raft

REFURBISHMENT OF AN EXISTING BED AND BREACKFAST This bed and breakfast is located in the city centre of Bologna, surrounded by other existing buildings and properties. The client wanted to entirely refurbish the property, in order to provide a better architectural layout for his activity. This meant that all the existing RC floors were demolished, retaining only the external party walls on the boundary lines.EN7 srl was instructed as structural engineers for the project at the time, and this was one of my first works as a structural designer. The challenge of the project was the construction site itself: the access to the site was only one tiny door in the front of the building, negligible if compared to the size of the structure itself. According to that I thought that using lightweight steel members was the best solution for the primary structure. In order to reduce the floor structural thickness we have developed a timber floor solution, made of 3No. layers of C20 timber planks, glued and screwed to each other. According to that, it was easy to transport the planks on site. The maximum span covered on that project was circa 4 meters, achievable due to the bi-directional behaviour of the floor. The substitution of the existing heavy floors with new timber ones increased highly the seismic performance of the structure.

Working at EN7 srl Year: 2014 Client: Private Location: Bologna (IT) Status: Completed

Structural plans of the building

A model studied during the design process

Timber to steel connection details

The new timber floors built

Junction steel to steel

Steel to steel connection details

Steel structure analysis

Construction stage

Fp engineering portfolio  
Fp engineering portfolio