Local and Distortional Buckling of Axially Loaded Cold Rolled Sigma Profiles

Ciesielczyk, Katarzyna; Rzeszut, Katarzyna

doi:10.1515/ama-2016-0033

Abstract

In this paper the local and distortional buckling analyses of axially loaded cold-rolled channel and sigma profiles were performed. The critical buckling load was computed by solving the linear eigenvalue problem for different numerical models using Finite Element Method and simplified formulas implemented in Eurocode and proposed by Hancock and Schafer. The buckling analyses were conducted to prove that the sigma cross-section can be successfully replaced by channel cross-section with additional elastic supports placed in folds of the web. It was demonstrated that the folds in the web of the sigma cross-section (additional elastic supports) reduce the slenderness of the web. So, the critical distortional stress can be calculated based on analytical formulas derived for the channel cross-section taking into account the web height between the folds.

References

1. Abaqus Documentation – version 6.13, http://www.abaqus.com
Search in Google Scholar
2. Davies J.M., Jiang C. (1996), Design of thin walled columns for distortional buckling, Proceedings of the Second International Conference on Coupled Instability in Metal Structures CIMS’96, Liege, Belgium.
Search in Google Scholar
3. EN 1993-1-3, Eurocode 3 (2006), Design of steel structures – Part 1-3: General rules – Supplementary rules for cold-formed members and sheeting.
Search in Google Scholar
4. He Z., Zhou X., Liu Z., Chen M. (2014), Post-buckling behaviour and DSM design of web-stiffened lipped channel columns with distortional and local mode interaction, Thin-Walled Structures, 84, 189–203.10.1016/j.tws.2014.07.001
Search in Google Scholar
5. Lau, S.C.W., Hancock, G.J. (1990), Inelastic buckling of channel columns in the distortional mode, Thin – Walled Structures, 10, 59-84.10.1016/0263-8231(90)90005-J
Search in Google Scholar
6. Long-yuan Li (2009), Analyses of distortional buckling of cold-formed sigma purlins using EN 1993-1-3, Journal of Constructional Steel Research, 65, 2099-2102.10.1016/j.jcsr.2009.06.017
Search in Google Scholar
7. Long-yuan Li, Jian-kang Ch. (2008), An analytical model for analysing distortional buckling of cold-formed steel sections, Thin – Walled Structures, 46, 1430-1436.10.1016/j.tws.2008.03.005
Search in Google Scholar
8. Pala M. (2006) A new formulation for distortional buckling stress in cold-formed steel members, Journal of Constructional Steel Research, 62, 716–722.10.1016/j.jcsr.2005.09.011
Search in Google Scholar
9. Pala M., Caglarb N. (2007), A parametric study for distortional buckling stress on cold-formed steel using a neural network, Journal of Constructional Steel Research, 63, 686–691.10.1016/j.jcsr.2006.07.005
Search in Google Scholar
10. Schafer B.W. (2000), Distortional buckling of cold-formed steel columns, Final Report of AISI.
Search in Google Scholar
11. Schafer B.W. (2008), Review: The Direct Strength Method of cold-formed steel member design, Journal of Constructional Steel Research, 64 766–778.10.1016/j.jcsr.2008.01.022
Search in Google Scholar
12. Szymczak C., Werochowski W. (2005), Distortional instability of axially loaded cold-formed elements with stiffened flanges (in Polish), Inżynieria i Budownictwo, R. 61, 2, 85-88.
Search in Google Scholar
13. Wang L., Young B. (2014), Design of cold-formed steel channels with stiffened webs subjected to bending, Thin-Walled Structures, 85, 81–92.10.1016/j.tws.2014.08.002
Search in Google Scholar
14. Yua C., Schafer B.W. (2007), Simulation of cold-formed steel beams in local and distortional buckling with applications to the direct strength method, Journal of Constructional Steel Research, 63, 581–590.10.1016/j.jcsr.2006.07.008
Search in Google Scholar
15. Zhou X., Liu Z., , He Z. (2015), General distortional buckling formulae for both fixed-ended and pinned-ended C-section columns, Thin-Walled Structures, 94, 603–611.10.1016/j.tws.2015.04.032
Search in Google Scholar

Local and Distortional Buckling of Axially Loaded Cold Rolled Sigma Profiles

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