QUT ePrints

Experimental study of the mechanical properties of light gauge cold-formed steels at elevated temperatures

Ranawaka, Thanuja & Mahendran, Mahen (2009) Experimental study of the mechanical properties of light gauge cold-formed steels at elevated temperatures. Fire Safety Journal, 44(2), pp. 219-229.

View at publisher

Abstract

In recent times, light gauge cold-formed steel sections have been used extensively as primary load bearing structural members in many applications in the building industry. Fire safety design of structures using such sections has therefore become more important. Deterioration of mechanical properties of yield stress and elasticity modulus is considered the most important factor affecting the performance of steel structures in fires. Hence there is a need to fully understand the mechanical properties of light gauge cold-formed steels at elevated temperatures. A research project based on experimental studies was therefore undertaken to investigate the deterioration of mechanical properties of light gauge cold-formed steels. Tensile coupon tests were undertaken to determine the mechanical properties of these steels made of both low and high strength steels and thicknesses of 0.60, 0.80 and 0.95 mm at temperatures ranging from 20 to 800ºC. Test results showed that the currently available reduction factors are unsafe to use in the fire safety design of cold-formed steel structures. Therefore new predictive equations were developed for the mechanical properties of yield strength and elasticity modulus at elevated temperatures. This paper presents the details of the experimental study, and the results including the developed equations. It also includes details of a stress-strain model for light gauge cold-formed steels at elevated temperatures.

Impact and interest:

21 citations in Scopus
Search Google Scholar™
15 citations in Web of Science®

Citation countsare sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

Full-text downloads:

483 since deposited on 04 Feb 2010
213 in the past twelve months

Full-text downloadsdisplays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.

ID Code: 30252
Item Type: Journal Article
Keywords: Light gauge cold-formed steel, elevated temperatures, mechanical properties, reduction factors, yield strength, elasticity modulus, stress-strain model, fire safety design
DOI: 10.1016/j.firesaf.2008.06.006
ISSN: 0379-7112
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
Past > Schools > School of Urban Development
Copyright Owner: Copyright Elsevier 2009
Deposited On: 05 Feb 2010 09:16
Last Modified: 01 Mar 2012 00:03

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page