Lateral distortional buckling design rules for back to back LiteSteel beams

Jeyaragan, Sivapathasunderam & Mahendran, Mahen (2009) Lateral distortional buckling design rules for back to back LiteSteel beams. 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. 77-82.


A new cold-formed steel beam, known as the LiteSteel Beam (LSB), has the potential to transform the low-rise building industry. The new beam is effectively a channel section with two rectangular hollow flanges and a slender web, and is manufactured using a simultaneous cold-forming and electric resistance welding process. Research into the flexural behaviour of single LSB members showed that the LSBs are susceptible to lateral distortional buckling effects and their moment capacities are significantly reduced for intermediate spans. Build-up LSB sections are expected to improve their flexural capacity and to enhance their applications. They are also likely to mitigate the detrimental effects of lateral distortional buckling observed with single LSB members of intermediate spans. However, the behaviour of build up beams is not well understood. Currently available design rules were found to be inadequate to predict the member moment capacities of back to back LSBs. Therefore a research project based on both experimental and numerical studies was undertaken to investigate the flexural behaviour of back to back LSBs with various longitudinal connection spacings under a uniform moment. New design rules were developed using the moment capacity data obtained using finite element analyses and experimental tests. This paper presents the details of the development of design rules for the back to back LSB sections.

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ID Code: 32973
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: Build-up back to back LiteSteel Beams, Cold-formed Steel Structures, Lateral Distortional Buckling
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: 29 Jun 2010 07:25
Last Modified: 01 Dec 2011 06:04

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