Nonlinear analysis of concrete-filled thin-walled steel box columns with local buckling effects
Article
Article Title | Nonlinear analysis of concrete-filled thin-walled steel box columns with local buckling effects |
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ERA Journal ID | 4225 |
Article Category | Article |
Authors | Liang, Qing Quan (Author), Uy, Brian (Author) and Liew, J. Y. Richard (Author) |
Journal Title | Journal of Constructional Steel Research |
Journal Citation | 62 (6), pp. 581-591 |
Number of Pages | 11 |
Year | 2006 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0143-974X |
1873-5983 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jcsr.2005.09.007 |
Web Address (URL) | http://www.elsevier.com/wps/find/journaldescription.cws_home/405901/description#description |
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. |
Keywords | composite column, effective width, fiber element method, local buckling, nonlinear analysis, strength, ductility |
ANZSRC Field of Research 2020 | 400510. Structural engineering |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Department of Agricultural, Civil and Environmental Engineering |
University of New South Wales | |
National University of Singapore |
https://research.usq.edu.au/item/9y040/nonlinear-analysis-of-concrete-filled-thin-walled-steel-box-columns-with-local-buckling-effects
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