Shear strength tests of lipped channel beams

Poologanathan, Keerthan & Mahendran, Mahen (2013) Shear strength tests of lipped channel beams. In Proceedings of the 10th Pacific Structural Steel Conference (PSSC 2013) – Advancements and Achievements in Structural Steel, Research Publishing, Singapore.

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Abstract

This paper presents the details of experimental studies on the shear behaviour and strength of lipped channel beams (LCBs). The LCB sections are commonly used as flexural members in residential, industrial and commercial buildings. To ensure safe and efficient designs of LCBs, many research studies have been undertaken on the flexural behaviour of LCBs. To date, however, limited research has been conducted into the strength of LCB sections subject to shear actions. Therefore a detailed experimental study involving 20 tests was undertaken to investigate the shear behaviour and strength of LCBs. This research has shown the presence of increased shear capacity of LCBs due to the additional fixity along the web to flange juncture, but the current design rules (AS/NZS 4600 and AISI) ignore this effect and were thus found to be conservative. Therefore they were modified by including a higher elastic shear buckling coefficient. Ultimate shear capacity results obtained from the shear tests 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. Hence the AS/NZS 4600 and AISI design rules were further modified to include the available post-buckling strength. Suitable design rules were also developed under the direct strength method (DSM) format. This paper presents the details of this study and the results including the modified shear design rules.

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ID Code: 60673
Item Type: Conference Paper
Refereed: Yes
Keywords: Shear Tests, Lipped Channel Beams, Cold-formed Steel, Direct Strength Method (DSM), Experimental
ISBN: 978-981-07-7137-9
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 The Authors
Deposited On: 16 Jun 2013 22:22
Last Modified: 01 Aug 2015 18:51

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