Modeling Axial Compression Behavior of Cold-Formed Steel Sections
Keywords:
Cold-formed steel, Axial compression, Geometric imperfectionAbstract
This paper was conducted in order to investigate behavior of cold-formed steel members under axial compression loading using the finite element analysis. The numerical results were compared with the results from some existing laboratory experiments and the predicted load from the effective width method. The samples consisted of the channel sections and the lipped channel sections for which the laboratory test results were available. The numerical results, including the axial compression capacity of the samples and their mechanical behavior during the loading, indicated that geometric imperfection affected the nonlinear behavior, the buckling modes and the failure patterns of the cold-formed steel sections. Applying effect of geometric imperfection in the nonlinear finite element analysis could provide the more realistic behavior of the axially loaded cold formed steel sections.
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