الفهرس 
Cold-formed steel (CFS)Only 14 pages are availabe for public view
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Abstract
New tests on built-up cold-formed steel section battened columns were conducted in this study. The test specimens were pin-ended columns consisting of two channels placed back-to-back at different distances. The channels were connected using batten plates placed at different spacings. The built-up columns had accordingly different slenderness, geometries and different lengths. The column strengths, load-axial shortening, load-lateral displacement and load-axial strains were measured in the tests. In addition, the failure modes and deformed shapes at failure were observed in the tests. The test data were used to validate a nonlinear 3-D finite element model developed in this study. The column strengths, failure modes, load-axial shortening, load-axial strains and load-lateral displacement relationships were predicted numerically and validated well against that measured experimentally. The validated finite element was used to perform parametric studies investigating the effects of different parameters affecting the behaviour and strength of the columns. the parameters comprised different slenderness, different geometries and different lengths. The test and numerical strengths were compared with the design strengths calculated using the American, British and Australian standards.