Strength of concrete-filled steel box columns with local buckling effects

Liang, Qing Quan and Uy, Brian and Liew, J. Y. Richard (2005) Strength of concrete-filled steel box columns with local buckling effects. In: 2005 Australian Structural Engineering Conference (ASEC 2005), 11-14 September, 2005, Newcastle, Australia.

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Abstract

Local buckling of steel plates with geometric imperfections and residual stresses significantly reduces the ultimate strength of concrete-filled thin-walled steel box columns. The effects of local buckling, however, have not been considered in advanced analysis programs that lead to the overestimate of the ultimate loads of composite columns and frames. This paper presents a nonlinear fiber element analysis method for predicting the ultimate strength and behavior of short concrete-filled thin-walled steel box columns with local buckling effects. The constitutive models in the method consider the stress-strain behavior of confined concrete and structural steel. Local buckling is incorporated in the fiber element analysis programs by adopting the effective width models, which account for the effects of geometric imperfections and residual stresses. The progressive local and post-local buckling is simulated by gradually redistributing the stresses within the steel box. The fiber element analysis technique developed can be employed in advanced analysis programs for the analysis of composite frames. The accuracy of the proposed fiber element analysis method for concrete-filled steel box columns is established by comparisons with existing experimental results.

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Item Type:	Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed:	Yes
Item Status:	Live Archive
Additional Information:	No evidence of copyright restrictions.
Faculty/School / Institute/Centre:	Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering (Up to 30 Jun 2013)
Faculty/School / Institute/Centre:	Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering (Up to 30 Jun 2013)
Date Deposited:	08 May 2008 23:45
Last Modified:	02 Jul 2013 22:52
Uncontrolled Keywords:	concrete-filled steel tubes, composite columns, local buckling, fiber element analysis, nonlinear analysis, post-local buckling, ultimate strength
Fields of Research (2008):	09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
URI:	http://eprints.usq.edu.au/id/eprint/3401

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