Web crippling tests of cold-formed steel channels under two flange load cases

Gunalan, Shanmuganathan & Mahendran, Mahen (2015) Web crippling tests of cold-formed steel channels under two flange load cases. Journal of Constructional Steel Research, 110, pp. 1-15.

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Abstract

Cold-formed steel members have many advantages over hot-rolled steel members. However, they are susceptible to various buckling modes at stresses below the yield stress of the member because of their relatively high width-to-thickness ratio. Web crippling is a form of localized failure mode that can occur when the members are subjected to transverse high concentrated loadings and/or reactions. The four common loading conditions are the end-one-flange (EOF), interior-one-flange (IOF), end-two-flange (ETF) and interior-two-flange (ITF) loadings. Recently a test method has been proposed by AISI to obtain the web crippling capacities under these four loading conditions. Using this test method 42 tests were conducted in this research to investigate the web crippling behaviour and strengths of unlipped channels with stocky webs under ETF and ITF cases. DuraGal sections having a nominal yield stress of 450 MPa were tested with different web slenderness and bearing lengths. The flanges of these channel sections were not fastened to the supports. In this research the suitability of the currently available design rules for unlipped channels subject to web crippling was investigated, and suitable modifications were proposed where necessary. In addition to this, a new design rule was proposed based on the direct strength method to predict the web crippling capacities of tested beams. This paper presents the details of this experimental study and the results.

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2 citations in Web of Science®
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ID Code: 84086
Item Type: Journal Article
Refereed: Yes
Keywords: Cold-formed Steel structures, Unlipped channels, Web crippling, ETF and ITF Load cases, Experiments
DOI: 10.1016/j.jcsr.2015.01.018
ISSN: 0143-974X
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright © 2015 Elsevier B.V
Deposited On: 13 May 2015 03:12
Last Modified: 18 Apr 2017 12:48

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