Local and post-local buckling of steel tubes in thin-walled circular concrete-filed steel tubular columns

Walker, Craig Louis (2006) Local and post-local buckling of steel tubes in thin-walled circular concrete-filed steel tubular columns. [USQ Project] (Unpublished)

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Abstract

The local and post-local buckling behaviour of steel tubes in thin-walled circular concrete-filled steel tubular columns under axial load is presented. Geometric and material nonlinear finite element analysis is conducted on steel tubes under uniform edge compression to determine critical local and post-local buckling strengths. The local and post-local buckling of steel tubes reduces the ultimate loads of thinwalled circular CFST columns under axial compression. Limited experimental research on CFST columns has been conducted. The effects of local and postlocal buckling on the behaviour of thin-walled circular CFST columns have not been adequately researched. Three-dimensional finite element models are developed using the finite element technique. Initial geometric imperfections, residual stresses, material yielding and strain hardening are considered in the analysis. Based on the results obtained from the nonlinear finite element analysis, a set of design formulas is proposed for determining the critical local buckling loads and ultimate strengths of steel tubes in thin-walled circular CFST columns. The proposed design formulas are verified by comparisons with existing experimental results.


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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 11 Oct 2007 01:03
Last Modified: 02 Jul 2013 22:43
Uncontrolled Keywords: concrete-filled steel tubular (CFST); buckling; tubular columns
Fields of Research (FOR2008): 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
URI: http://eprints.usq.edu.au/id/eprint/2334

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