Abstract
AbstractGeometric imperfections have significant effects on the buckling and capacities of cold-formed thin-walled structures, and should be considered in structural analysis. Cold-rolled aluminium alloy sections are new structural products of BlueScope Permalite that can be seen as thin-walled structures to be prone to bucklings. This paper investigates the effects of sectional imperfections on the strength and behavior of cold-rolled aluminium alloy channel sections under compression using finite element simulations. The compression calibrated models presented in publications of Pham et al. on cold-rolled aluminium structures are utilized in this investigation. Sectional measured imperfection data is also collected from Pham et al., and is the basis to generate random samples for numerical investigation using the Latin Hypercube technique. The random imperfection values are incorporated into the simulations with a variety of imperfection shape modes. The simulation results are thoroughly analysed to demonstrate the imperfection effects on the capacities and behaviors of cold-rolled aluminium alloy channel sections. Recommendations are given to the selections of imperfection shape modes for further studies.KeywordsSectional imperfectionsStrength and behaviorCold-rolled aluminium alloy channelStub columns
Published Version
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