Distortional buckling tests of cold-formed steel compression members at elevated temperatures

Ranawaka, Thanuja & Mahendran, Mahen (2009) Distortional buckling tests of cold-formed steel compression members at elevated temperatures. Journal of Constructional Steel Research, 65(2), pp. 249-259.

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In recent times, light gauge cold-formed steel sections have been used extensively since they have a very high strength to weight ratio compared with thicker hot-rolled steel sections. However, they are susceptible to various buckling modes including a distortional mode and hence show complex behaviour under fire conditions. Therefore a research project based on detailed experimental studies was undertaken to investigate the distortional buckling behaviour of light gauge cold-formed steel compression members under simulated fire conditions. More than 150 axial compression tests were undertaken at uniform ambient and elevated temperatures. Two types of cross sections were selected with nominal thicknesses of 0.60, 0.80, and 0.95 mm. Both low (G250) and high (G550) strength steels were used. Distortional buckling tests were conducted at six different temperatures in the range of 20 to 800°C. The ultimate loads of compression members subject to distortional buckling were then used to review the adequacy of the current design rules at ambient and elevated temperatures. This paper presents the details of this experimental study and the results.

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20 citations in Web of Science®
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ID Code: 30253
Item Type: Journal Article
Refereed: Yes
Funders: ARC
Keywords: Light gauge cold-formed steel members, Compression tests, Distortional buckling, Elevated temperatures, Fire safety design
DOI: 10.1016/j.jcsr.2008.09.002
ISSN: 0143-974X
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright Elsevier 2009
Deposited On: 04 Feb 2010 22:50
Last Modified: 24 Jun 2017 14:40

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