Experimental studies on web crippling behaviour of hollow flange channel beams under two flange load cases
Poologanathan, Keerthan, Mahendran, Mahen, & Steau, Edward (2014) Experimental studies on web crippling behaviour of hollow flange channel beams under two flange load cases. Thin-Walled Structures, 85, pp. 207-219.
This paper presents the details of an experimental study of a cold-formed steel hollow flange channel beam known as LiteSteel beam (LSB) subject to web crippling under End Two Flange (ETF) and Interior Two Flange (ITF) load cases. The LSB sections with two rectangular hollow flanges are made using a simultaneous cold-forming and electric resistance welding process. Due to the geometry of the LSB, and its unique residual stress characteristics and initial geometric imperfections, much of the existing research for common cold-formed steel sections is not directly applicable to LSB. Experimental and numerical studies have been carried out to evaluate the behaviour and design of LSBs subject to pure bending, predominant shear and combined actions. To date, however, no investigation has been conducted on the web crippling behaviour and strength of LSB sections. Hence an experimental study was conducted to investigate the web crippling behaviour and capacities of LSBs. Twenty-eight web crippling tests were conducted under ETF and ITF load cases, and the ultimate web crippling capacities were compared with the predictions from the design equations in AS/NZS 4600 and AISI S100. This comparison showed that AS/NZS 4600 and AISI S100 web crippling design equations are unconservative for LSB sections under ETF and ITF load cases. Hence new equations were proposed to determine the web crippling capacities of LSBs based on experimental results. Suitable design rules were also developed under the direct strength method (DSM) format.
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|Item Type:||Journal Article|
|Keywords:||Hollow Flange Channel Beams, Cold-formed Steel Beams, Web Crippling, ETF and ITF Load Cases, Direct Strength Method, Experiments|
|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 2014 Thin-Walled Structures|
|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 85, ISSUE , (DATE)] DOI: 10.1016/j.tws.2014.08.011|
|Deposited On:||02 Oct 2014 01:10|
|Last Modified:||05 Dec 2016 08:57|
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