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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 71
Edited by: G. De Roeck and B.H.V. Topping
Paper V.3

Finite Element Instability Analysis of Composite Bridge Girders

H.R. Ronagh+, M. Golestani-Rad# and M.A. Bradford*

+Department of Civil Engineering, University of Queensland, Brisbane, Queensland, Australia
#Department of Civil Engineering, University of Yazd, Iran
*School of Civil Engineering, University of New South Wales, Sydney, New South Wales, Australia

Full Bibliographic Reference for this paper
H.R. Ronagh, M. Golestani-Rad, M.A. Bradford, "Finite Element Instability Analysis of Composite Bridge Girders", in G. De Roeck, B.H.V. Topping, (Editors), "Computational Civil and Structural Engineering", Civil-Comp Press, Edinburgh, UK, pp 95-100, 2000. doi:10.4203/ccp.71.5.3
The steel joist of composite bridge girders is susceptible to a particular type of instability which may be referred to as "Restricted-Distortional Buckling". Knowledge of the critical load at which this type of instability occurs is necessary for design. There are different methods available in the literature, with different levels of approximation, but not all produce similar results. This paper will review these methods, and explain their strengths and /or weaknesses. It will also introduce a new technique in detail and present some of the results in a non-dimensional format.

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