Ultimate shear strength of LiteSteel beams
Poologanathan, Keerthan & Mahendran, Mahen (2009) Ultimate shear strength of LiteSteel beams. In Surawaski, Nicholas & Wiliem, Arnold (Eds.) Proceedings for the 3rd Smart Systems Postgraduate Student Conference, Queensland University of Technology, Queensland University of Technology, Brisbane, pp. 83-88.
This paper presents the details of an investigation on the shear behaviour of a recently developed, cold-formed steel beam known as LiteSteel Beam (LSB).The LSB section has a unique shape of a channel beam with two rectangular hollow flanges and is produced by a patented manufacturing process involving simultaneous cold-forming and dual electric resistance welding. In the present investigation, a series of numerical analyses based on three-dimensional finite element modeling and an experimental study were carried out to investigate the shear behaviour of 10 different LSB sections. It was found that the current design rules in cold-formed steel structures design codes are very conservative for the shear design of LiteSteel beams. Significant improvements to web shear buckling occurred due to the presence of rectangular hollow flanges while considerable post-buckling strength was also observed. 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 investigation and the results including the final design rules for the shear capacity of LSBs. It also presents new shear strength formulae for lipped channel beams based on the current design equations for shear strength given in AISI (2007) using the same approach used for LSBs.
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|Item Type:||Conference Paper|
|Keywords:||Ultimate Shear Strength, Post-buckling, LiteSteel Beams, Direct Strength Method, Cold-formed Steel|
|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 23:21|
|Last Modified:||14 Nov 2013 02:21|
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