Author: H.S. Arshi, F.K. Günzel and K.J.L. Stone (Division of Built Environment & Civil Engineering, University of Brighton, Brighton, UK)
31 August 2012
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H.S. Arshi, F.K. Günzel and K.J.L. Stone (Division of Built Environment & Civil Engineering, University of Brighton, Brighton, UK)
The Structural Engineer, Volume 90, Issue 9, 2012, Page(s) 6
Arup’s Naeem Hussain comments on a recently published book from one of the industry’s most eminent bridge designers: Professor Holger Svensson
Topics of importance openly discussed...
In this paper a procedure for the comparison of steel column design by load and resistance factor design (LRFD) method, between the Egyptian code and other codes of practice, is set out. A column design curve for slender sections was established by applying a reduction factor, Q, to the LRFD column design curve. A stability analysis was conducted to study the effect of plate local buckling on flexural column buckling. A finite element model of an axially loaded I-column was developed using shell elements. Material and geometric nonlinearities were incorporated. Geometric imperfections similar to the first buckling mode with amplitude of 1/750 of column length, L, were applied. The analysis was carried out using a general purpose finite element program ANSYS. A wide range of plate width-to-thickness ratios and column slenderness ratios was studied. Column sections were grouped into three: Group 1; sections with slender unstiffened plate elements, Group 2; sections with slender stiffened plate elements, and Group 3; sections composed of slender stiffened and unstiff ened elements. The buckling loads for 144 I-column configurations made of steel St.37, St.44 and St.52 were compared to respective values adopted by the AISC-LRFD and Eurocode 3 specifications.