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Post-buckling Strength of LiteSteel Beams in Shear

Poologanathan, Keerthan & Mahendran, Mahen (2009) Post-buckling Strength of LiteSteel Beams in Shear. In The 6th International Conference on Advances in Steel Structures, 16-18 December 2009, Hong Kong.

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Abstract

This paper presents the details of experimental and numerical studies on the shear behaviour of a recently developed, cold-formed steel beam known as LiteSteel Beam (LSB). The LSB sections are produced by a patented manufacturing process involving simultaneous cold-forming and electric resistance welding. It has a unique shape of a channel beam with two rectangular hollow flanges. Recent research has demonstrated the presence of increased shear capacity of LSBs due to the additional fixity along the web to flange juncture, but the current design rules ignore this effect. Therefore they were modified by including a higher elastic shear buckling coefficient. In the present study, the ultimate shear capacity results obtained from the experimental and numerical studies of 10 different LSB sections were compared with the modified shear capacity design rules. It was found that they are still conservative as they ignore the presence of post-buckling strength. Therefore the design rules were further modified to include the available post-buckling strength. Suitable design rules were also developed under the direct strength method format. This paper presents the details of this study and the results including the final design rules for the shear capacity of LSBs.

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ID Code: 30286
Item Type: Conference Paper
Keywords: LiteSteel beams, Cold-formed steel structures, Shear Strength, Direct Strength Method, Post-buckling
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Urban Development
Copyright Owner: Copyright 2009 Please consult the authors.
Deposited On: 08 Feb 2010 15:34
Last Modified: 01 Mar 2012 00:06

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