Abstract
This paper is concerned with the behaviour and ultimate load-carrying capacity of fully encased battened steel columns subjected to axially or eccentrically applied compression. A nonlinear three-dimensional finite element model has been developed to simulate the columns by using ABAQUS software package. Three encased composite columns and their reference battened steel columns have been modelled. The accuracy of the finite element modelling has been assessed by comparing the results with the corresponding experimental values. Parametric studies have been carried out in order to examine their effects on the behaviour and ultimate strength of the composite columns. Parameters such as relative slenderness (), compressive strength of concrete (fck), yield strength of structural steel (fy), load eccentricity, and initial out-of-straightness have been considered. The results are presented in the form of column curves. It is found that composite columns show significantly higher ultimate strength and stiffness ...
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