Lateral-torsional buckling of cold-formed steel beams at ambient temperature

Kankanamge, Nirosha & Mahendran, Mahen (2009) Lateral-torsional buckling of cold-formed steel beams at ambient temperature. In Surawski, Nicholas C. & Wiliem, Arnold (Eds.) Proceedings for the 3rd Smart Systems Postgraduate Student Conference, Queensland University of Technology, Queensland University of Technology, Brisbane, pp. 100-106.


Cold-formed steel beams are increasingly used as floor joists and bearers in residential, industrial and commercial buildings. Their structural behaviour and moment capacities are influenced by lateral-torsional buckling and hence a research study was undertaken to investigate the lateral-torsional buckling behaviour of cold-formed steel lipped channel beams at ambient and elevated temperatures. For this purpose a finite element model of a simply supported cold-formed steel lipped channel beam under uniform bending was developed first and validated using available numberical and experimental results. It was then used in a detailed parametric study to simulate the lateral-torsional behaviour of cold-formed steel beams under varying conditions. The moment capacity results were then compared with the predictions from the current ambient temperature design rules in Australia, New Zealand, American and European codes for cold-formed steel structures. Some very interesting results have been obtained. European design rules are found to be conservative while Australian and American design rules are unsafe. This paper presents the results of finite element analyses for ambient temperature conditions, and the comparison with the current design rules.

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ID Code: 32983
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: Lateral-torsional Buckling, Cold-formed Steel, Lipped Channel Beams
ISBN: 9780980582727
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Past > Schools > School of Urban Development
Copyright Owner: Copyright 2009 Queensland University of Technology
Deposited On: 30 Jun 2010 23:48
Last Modified: 01 Dec 2011 06:04

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