Nonlinear analysis of concrete-filled thin-walled steel box columns with local buckling effects

Liang, Qing Quan and Uy, Brian and Liew, J. Y. Richard (2006) Nonlinear analysis of concrete-filled thin-walled steel box columns with local buckling effects. Journal of Constructional Steel Research, 62 (6). pp. 581-591. ISSN 0143-974X

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Abstract

[Abstract]: Local buckling of steel plates reduces the ultimate loads of concrete-filled thin-walled steel box columns under axial compression. The effects of local buckling have not been considered in advanced analysis methods that lead to the overestimates of the ultimate loads of composite columns and frames. This paper presents a nonlinear fiber element analysis method for predicting the ultimate strengths and behavior of short concrete-filled thin-walled steel box columns with local buckling effects. The fiber element method considers nonlinear constitutive models for confined concrete and structural steel. Effective width formulas for steel plates with geometric imperfections and residual stresses are incorporated in the fiber element analysis program to account for local buckling effects. The progressive local and post-local buckling is simulated by gradually redistributing the normal stresses within the steel plates. Two performance indices are proposed for evaluating the section and ductility performance of concrete-filled steel box columns. The computational technique developed is used to investigate the effects of the width-to-thickness ratios and concrete compressive strengths on the ultimate strength and ductility of concrete-filled steel box columns. It is demonstrated that the nonlinear fiber element method developed predicts well the ultimate loads and behavior of concrete-filled thin-walled steel box columns and can be implemented into advanced analysis programs for the nonlinear analysis of composite frames.

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Item Type:	Article (Commonwealth Reporting Category C)
Refereed:	Yes
Item Status:	Live Archive
Additional Information:	Deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School:	Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited:	11 Oct 2007 00:54
Last Modified:	02 Jul 2013 22:41
Uncontrolled Keywords:	composite column, effective width, fiber element method, local buckling, nonlinear analysis, strength, ductility
Fields of Research :	09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
Identification Number or DOI:	10.1016/j.jcsr.2005.09.007
URI:	http://eprints.usq.edu.au/id/eprint/1939

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