Experimental study on web crippling strength of hollow flange channels under end-one-flange and interior-one-flange load cases

Poologanathan, Keerthan & Mahendran, Mahen (2016) Experimental study on web crippling strength of hollow flange channels under end-one-flange and interior-one-flange load cases. Advances in Structural Engineering, 19(6), pp. 966-981.

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Abstract

LiteSteel beam (LSB) is a hollow flange channel made from cold-formed steel using a patented manufacturing process involving simultaneous cold-forming and dual electric resistance welding. LSBs are currently used as floor joists and bearers in buildings. However, there are no appropriate design standards available due to its unique hollow flange geometry, residual stress characteristics and initial geometric imperfections arising from manufacturing processes. Recent research studies have focused on investigating the structural behaviour of LSBs under pure bending, predominant shear and combined actions. However, web crippling behaviour and strengths of LSBs still need to be examined. Therefore, an experimental study was undertaken to investigate the web crippling behaviour and strengths of LSBs under EOF (End One Flange) and IOF (Interior One Flange) load cases. A total of 23 web crippling tests were performed and the results were compared with the current AS/NZS 4600 and AISI S100 design standards, which showed that the cold-formed steel design rules predicted the web crippling capacity of LSB sections very conservatively under EOF and IOF load cases. Therefore, suitably improved design equations were proposed to determine the web crippling capacity of LSBs based on experimental results. In addition, new design equations were also developed under the Direct Strength Method format. This paper presents the details of this experimental study on the web crippling behaviour and strengths of LiteSteel beams under EOF and IOF load cases and the results.

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ID Code: 93991
Item Type: Journal Article
Refereed: Yes
Keywords: Hollow Flange Channel Beams, Web Crippling, End One Flange Load Cases, Interior One Flange Load Case, Experiments, Direct Strength Method
DOI: 10.1177/1369433216630462
ISSN: 1369-4332
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2016 Multi-Science Publishing
Deposited On: 18 Mar 2016 01:58
Last Modified: 19 Apr 2017 19:42

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