F. Dinu/D. Dubina/C. Neagu/C. Vulcu/I. Both/S. Herban · Experimental and numerical evaluation of an RBS coupling beam for moment-resisting steel frames in seismic areas
b)
a) Fig. 12. Von Mises equivalent stress: (a) RBS-L3, (b) RBS-L3_MOD
Due to the high stiffness of the columns, the contribution of the column web panel can be neglected. Numerical simulation allowed a modified RBS configuration to be calibrated in order to eliminate the stress concentration near the beam-to-column welds. The resulsts obtained for this adjusted model showed a better behavior with the development of plastic deformations in the reduced area only.
Acknowledgments Funding of the project was made in the frame of the contract 76/2011 “Numerical simulations and experimental tests on beam column subassemblies from the structure of a 17 storey steel building in Bucharest, Romania” between the “Politehnica” University of Timis¸oara and DMA ARCHITECTURE & INTERIOR DESIGN LTD, Bucharest, Romania Cristian Vulcu was partially supported by the strategic grant POSDRU/ 88/1.5/S/50783, project ID50783 (2009), co-financed by the European Social Fund – Investing in People,
within the Sectoral Operational Programme Human Resources Development 2007–2013.
References [1] AISC 341-05: Seismic provisions for structural steel buildings. American Institute for Steel Construction, 2005. [2] Johansson, B., Maquoi, R., Sedlacek, G., Müller, C., Beg, D.: Commentary and worked examples to EN 1993-1-5, JRC – ECCS cooperation agreement for the evolution of Eurocode 3, European Commission, 2007. [3] Dutta, A., Dhar, S., Acharyya, S. K.: Material characterization of SS 316 in low-cycle fatigue loading, Journal of Materials Science, vol. 45, No. 7, 2010, pp. 1782–1789. [4] ECCS – European Convention for Constructional Steelwork, Technical Committee 1, Structural Safety and Loadings; Working Group 1.3, Seismic Design: Recommended Testing Procedure for Assessing the Behaviour of Structural Steel Elements under Cyclic Loads, 1st ed., 1986. [5] EN 1993-1-1 Eurocode 3: Design of steel structures. General rules and rules for buildings, CEN, 2005.
[6] EN 1993-1-5 Eurocode 3: Design of steel structures. Part 1-5: General rules – Plated structural elements, CEN, 2006. [7] EN 1998-1. European Committee for Standardization – CEN: Eurocode 8: Design provisions for earthquake resistance of structures. Part 1.1: General rules. Seismic actions and general requirements for structures, Brussels, 2004. [8] Hibbit, D., Karlson, B., Sorenso, P.: ABAQUS User’s Manual, 2007, version 6.9. [9] Plumier, A.: New Idea for Safe Structures in seismic Zones. IABSE Symposium, Mixed structures including new materials, Brussels, 1990, pp. 431–436. Keywords: steel moment frame; reduced beam section; short beam; cyclic test; seismic design
Authors: Florea Dinu, Dan Dubina, Calin Neagu, Cristian Vulcu, Ioan Both, Sorin Herban “Politehnica” University of Timis¸oara, Department of Steel Structures & Structural Mechanics, Romania Dragos Marcu, Popp & Asociatii, Bucharest, Romania, dragos.marcu@popp-si-asociatii.ro
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