Local buckling studies of cold-formed steel compression members at elevated temperatures

Gunalan, Shanmuganathan, Bandula Heva, Yasintha, & Mahendran, Mahen (2015) Local buckling studies of cold-formed steel compression members at elevated temperatures. Journal of Constructional Steel Research, 108, pp. 31-45.

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Abstract

Cold-formed steel members have been widely used in residential and commercial buildings as primary load bearing structural elements. They are often made of thin steel sheets and hence they are more susceptible to local buckling. The buckling behaviour of cold-formed steel compression members under fire conditions is not fully investigated yet and hence there is a lack of knowledge on the fire performance of cold-formed steel compression members. Current cold-formed steel design standards do not provide adequate design guidelines for the fire design of cold-formed steel compression members. Therefore a research project based on extensive experimental and numerical studies was undertaken to investigate the local buckling behaviour of light gauge cold-formed steel compression members under simulated fire conditions. First a series of 91 local buckling tests was conducted at ambient and uniform elevated temperatures up to 700oC on cold-formed lipped and unlipped channels. Suitable finite element models were then developed to simulate the behaviour of tested columns and were validated using test results. All the ultimate load capacity results for local buckling were compared with the predictions from the available design rules based on AS/NZS 4600, BS 5950 Part 5, Eurocode 3 Parts 1.2 and 1.3 and the direct strength method (DSM), based on which suitable recommendations have been made for the fire design of cold-formed steel compression members subject to local buckling at uniform elevated temperatures.

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ID Code: 84090
Item Type: Journal Article
Refereed: Yes
Keywords: Cold-formed steel columns, Local buckling, Experiments, Finite element modelling, Elevated temperatures
DOI: 10.1016/j.jcsr.2015.01.011
ISSN: 0143-974X
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Funding:
Copyright Owner: Copyright 2015 Elsevier B.V.
Copyright Statement: This is the author’s version of a work that was accepted for publication in Journal of Constructional Steel Research. 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 Journal of Constructional Steel Research, [VOL 108, 2015] DOI: 10.1016/j.jcsr.2015.01.011
Deposited On: 13 May 2015 04:14
Last Modified: 04 Apr 2017 02:52

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