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Finite Element Post-buckling Analysis of Steel-Concrete Composite Column  

Oh, Myoung Ho (목포대학교 건설공학부)
Kim, Myeong Han (대진대학교 건축공학과)
Kim, Sang Dae (고려대학교 건축.사회환경시스템공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.19, no.6, 2007 , pp. 725-735 More about this Journal
Abstract
The local buckling strength and post-local buckling strength of thin steel plates in the steel-concrete composite column were evaluated by nonlinear finite element analyses. The proposed width-to-thickness limit ratio was based on elastic buckling analyses, in which the increased local buckling capacity of the plate due to the in-filled concrete was considered by the boundary conditions of the thin plate. Considering the initial imperfections and residual stresses, we determined the initial local buckling strength and post-local buckling strength of the thin plates with various width-to-thickness ratios. The formula to evaluate the compressive capacity of the steel-concrete composite column based on the effective width of the plate was proposed. For verification, values determined by the formula were compared with the experimental results.
Keywords
composite column; width-thickness ratio; intial imperfection; residual stress; effective width;
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