Nonlinear analysis of short concrete-filled steel tubular beam-columns under axial load and biaxial bending

Liang, Qing Quan (2008) Nonlinear analysis of short concrete-filled steel tubular beam-columns under axial load and biaxial bending. Journal of Constructional Steel Research, 64 (3). pp. 295-304. ISSN 0143-974X

Abstract

This paper presents a nonlinear fiber element analysis method for determining the axial load-moment strength interaction diagrams for short concrete-filled steel tubular (CFST) beam-columns under axial load and biaxial bending. Nonlinear constitutive models for confined concrete and structural steel are considered in the fiber element analysis. Efficient secant algorithms are developed to iterate the depth and orientation of the neutral axis within a composite section to satisfy equilibrium conditions. The accuracy of the fiber element analysis program is verified by comparisons of fiber analysis results with experimental data and existing solutions. The fiber element analysis program developed is employed to study the effects of steel ratios, concrete strengths and steel yield strengths on axial load-moment interaction diagrams, the C-ratio and maximum ultimate moments of CFST beam-columns. The proposed fiber element analysis technique is shown to be efficient and accurate and can be used directly in the design of CFST beam-columns and in advanced analysis programs for the nonlinear analysis of composite columns and frames.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Awaiting paper from author. Deposited in accordance with the copyright policy of the publisher.
Depositing User: Dr Stephen Liang
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 02 Apr 2008 02:34
Last Modified: 02 Jul 2013 23:00
Uncontrolled Keywords: biaxial bending; composite columns; fiber element analysis; nonlinear analysis; strength
Fields of Research (FOR2008): 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
01 Mathematical Sciences > 0103 Numerical and Computational Mathematics > 010303 Optimisation
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: doi: 10.1016/j.jcsr.2007.07.001
URI: http://eprints.usq.edu.au/id/eprint/4035

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