Corner properties of cold-formed steel sections at elevated temperatures

Ju Chen, Ben Young

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This paper presents the mechanical properties of the corner parts of cold-formed steel sections at elevated temperatures. Light-gauge structural members are cold-formed which results the mechanical properties of the corner parts being different from the flat parts. However, previous research has focused on the investigation of the corner parts of cold-formed steel sections at normal room temperature and the performance of the corner parts at elevated temperatures is unknown. An appropriate model for fire resistant design of steel structures necessitates a correct representation of mechanical properties of structural steel at elevated temperatures. Therefore, experimental investigation on corner coupon specimens at different temperatures ranged from approximately 20 to 1000oC was conducted to study the behaviour of the corner parts of cold-formed steel sections at elevated temperatures. Two kinds of corner coupon specimens, namely the inner corner coupon specimens and outer corner coupon specimens having the steel grade of G500 (nominal 0.2% proof stress of 500MPa) and nominal thickness of 1.9mm were tested. The test results were compared with the flat coupon specimens taken from the same cold-formed steel sections as the corner coupon specimens. A unified equation to predict the yield strength (0.2% proof stress) and elastic modulus of the corner parts of cold-formed steel sections at elevated temperatures is thus proposed in this paper. Generally, it is shown that the proposed equation adequately predicts the test results of the corner coupon specimens.

Original languageEnglish
Title of host publicationProceedings of the 10th East Asia-Pacific Conference on Structural Engineering and Construction, Real Structures: Bridges and Tall Buildings, Asian Institute of Technology, Bangkok, Thailand
Pages105-110
Number of pages6
Publication statusPublished - 1 Dec 2006
Externally publishedYes
Event10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010 - Bangkok, Thailand
Duration: 3 Aug 20065 Aug 2006

Conference

Conference10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010
Country/TerritoryThailand
CityBangkok
Period3/08/065/08/06

Keywords

  • Cold-formed steel
  • Corner
  • Elevated temperatures
  • Experimental investigation
  • Fire resistance design
  • Mechanical properties

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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