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Strength improvement methods for back to back Litesteel beams

Jeyaragan, Sivapathasunderam & Mahendran, Mahen (2010) Strength improvement methods for back to back Litesteel beams. In Proceedings of : 4th International Conference on Steel & Composite Structures, Sydney’s Powerhouse Museum, Sydney.

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Abstract

LiteSteel Beam (LSB) is a new cold-formed steel beam produced by OneSteel Australian Tube Mills (OATM). The new beam is effectively a channel section with two rectangular hollow flanges and a slender web, and is manufactured using patented dual electric resistance welding and automated roll-forming technologies. OATM is promoting the use of LSBs as flexural members in residential construction. When LSBs are used as back to back built-up sections, they are likely to improve their moment capacity. However, the research project conducted on the flexural behaviour of back to back built-up LSBs showed that the detrimental effects of lateral distortional buckling in single LSB members appear to remain with back to back built-up LSB members. The ultimate moment capacity of back to back LSB member is also affected by lateral distortional buckling failure. Therefore an investigation was conducted with an aim to develop suitable strength improvement methods, which are likely to mitigate lateral distortional buckling effects and hence improve the flexural strengths of back to back LSB members. This paper presents the details of this investigation, the results and recommendations for the most suitable and cost-effective method, which significantly improves the moment capacities of back to back LSB members.

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ID Code: 41196
Item Type: Conference Paper
Keywords: LiteSteel Beam, cold-formed steel members, Back to Back , Moment capacity
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Urban Development
Copyright Owner: Copyright 2010 please consult the authors
Deposited On: 11 Apr 2011 11:50
Last Modified: 12 Apr 2011 07:51

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