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Shear tests of Litesteel beams with web openings

Poologanathan, Keerthan & Mahendran, Mahen (2010) Shear tests of Litesteel beams with web openings. In 4th International Conference on Steel & Composite Structures, Research Publishing Services, Sydney’s Powerhouse Museum, Sydney.

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Abstract

This paper presents the details of experimental studies on the shear strength of a recently developed, cold-formed steel beam known as LiteSteel Beam (LSB) with web openings. The innovative LSB sections have the beneficial characteristics of torsionally rigid closed rectangular flanges combined with economical fabrication processes from a single strip of high strength steel. They combine the stability of hot-rolled steel sections with the high strength to weight ratio of conventional cold-formed steel sections. The LSB sections are commonly used as flexural members in the building industry. Current practice in flooring systems is to include openings in the web element of floor joists or bearers so that building services can be located within them. Shear behaviour of LSBs with web openings is more complicated while their shear strengths are considerably reduced by the presence of web openings. However, limited research has been undertaken on the shear behaviour and strength of LSBs with web openings. Therefore a detailed experimental study involving 26 shear tests was undertaken to investigate the shear behaviour and strength of different LSB sections. Simply supported test specimens of LSBs with an aspect ratio of 1.5 were loaded at midspan until failure. This paper presents the details of this experimental study and the results. Experimental results showed that the current design rules in cold-formed steel structures design codes (AS/NZS 4600) [1] are very conservative for the shear design of LSBs with web openings. Improved design equations have been proposed for the shear strength of LSBs with web openings based on experimental results from this study.

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ID Code: 41195
Item Type: Conference Paper
Keywords: LiteSteel Beam, Web Opening, Cold-formed Steel Beams, Experimental studies
DOI: 10.3850/978-981-08-6218-3_SS-Th019
ISBN: 9789810862183
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 Research Publishing Services
Deposited On: 11 Apr 2011 11:17
Last Modified: 16 Nov 2013 15:37

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