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Title: Finite element modeling of rolled steel shapes subjected to weak axis bending
Authors: Saliba, Najib G. 
Tawk, Issam 
Gergess, Antoine 
Affiliations: Department of Civil and Environmental Engineering 
Department of Mechanical Engineering 
Department of Civil and Environmental Engineering 
Keywords: Curving
Finite element
Point bending
Residual stresses
Issue Date: 2018
Part of: International journal of steel and composit structures
Volume: 29
Issue: 2
Start page: 161
End page: 173
Point bending is often used for cambering and curving structural steel girders. An analytical solution, applicable in the elasto-plastic range only, that relates applied loads to the desired curve was recently developed for inducing horizontal curves using four-point bending. This solution does not account for initial residual stresses and geometric imperfections built-in hotrolled sections. This paper presents results from a full-scale test on a hot-rolled steel section curved using four-point bending. In parallel, a numerical analysis, accounting for both initial geometric imperfections and initial residual stresses, was carried out. The models were validated against the experimental results and a good agreement for lateral offset and for strain in the elastoplastic and post-plastic ranges was achieved. The results show that the effect of initial residual stresses on deformation and strain is minimal. Finally, residual stresses due to cold bending calculated from the numerical analysis were assessed and a revised stress value for the service load design of the curved girder is proposed.
Type: Journal Article
Appears in Collections:Department of Civil and Environmental Engineering

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