Experimental studies of the shear behaviour and strength of lipped channel beams with web openings

Poologanathan, Keerthan & Mahendran, Mahen (2013) Experimental studies of the shear behaviour and strength of lipped channel beams with web openings. Thin-Walled Structures, 73, pp. 131-144.

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Abstract

Cold-formed steel members are increasingly used as primary structural elements in the building industries around the world due to the availability of thin and high strength steels and advanced cold-forming technologies. Cold-formed lipped channel beams (LCB) are commonly used as flexural members such as floor joists and bearers. However, their shear capacities are determined based on conservative design rules. 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 LCBs 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 LCBs with web openings. Hence a detailed experimental study involving 40 shear tests was undertaken to investigate the shear behaviour and strength of LCBs with web openings. Simply supported test specimens of LCBs with aspect ratios of 1.0 and 1.5 were loaded at midspan until failure. This paper presents the details of this experimental study and the results of their shear capacities and behavioural characteristics. Experimental results showed that the current design rules in cold-formed steel structures design codes are very conservative for the shear design of LCBs with web openings. Improved design equations have been proposed for the shear strength of LCBs with web openings based on the experimental results from this study.

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6 citations in Scopus
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5 citations in Web of Science®

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ID Code: 60809
Item Type: Journal Article
Refereed: Yes
Keywords: Lipped Channel beams, Shear strength, Cold-formed steel structures, Web openings, Shear tests
DOI: 10.1016/j.tws.2013.06.018
ISSN: 0263-8231
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Elsevier
Copyright Statement: This is the author’s version of a work that was accepted for publication in Thin-Walled Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Thin-Walled Structures, [VOL 73, (2013)] DOI: 10.1016/j.tws.2013.06.018
Deposited On: 16 Jun 2013 23:09
Last Modified: 23 Feb 2017 06:21

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