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Recent developments in the buckling and nonlinear analysis of thin-walled structural members |
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| Authors: | Gregory J Hancock Andrew J Davids Peter W Key Sammy CW Lau Kim JR Rasmussen |
| Affiliation: | a School of Civil and Mining Engineering, University of Sydney, Sydney, New South Wales 2006, Australia b Wargon Chapman Partners, Consulting Engineers, Sydney, New South Wales, Australia c Ove Arup and Partners, Consulting Engineers, Sydney, New South Wales, Australia |
| Abstract: | This paper describes recent work performed at the University of Sydney to develop buckling and nonlinear analyses of thin-walled structural members undergoing local, distortional and overall buckling. The analyses are based on the finite strip method of structural analysis and include elastic and inelastic buckling and the full nonlinear response with both post-local buckling and plasticity. Two variations of the finite strip method have been used, these being the semi-analytical and spline finite strip methods. A nonlinear beam-column analysis based on the influence coefficient method for including the local buckling behaviour in the overall member response is also described. The analytical methods are compared with tests performed at the University of Sydney on cold-formed rectangular hollow sections, welded I-sections, welded channel sections and cold-formed channel sections. Spatial plastic collapse mechanismsdeveloped for the welded sections described above are also compared with the post-ultimate response of the test sections. |
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