Fire design rules for LSF walls made of hollow flange channel sections

Kesawan, Sivakumar & Mahendran, Mahen (2016) Fire design rules for LSF walls made of hollow flange channel sections. Thin-Walled Structures, 107, pp. 300-314.

[img] Accepted Version (PDF 2MB)
Administrators only until October 2017 | Request a copy from author
Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0.

View at publisher

Abstract

Cold-formed Hollow Flange Channel (HFC) sections can be used in Light gauge Steel Frame (LSF) wall systems due to their structural efficiency. Recent experimental and finite element analysis based investigations conducted by the authors have demonstrated the superior fire performance of LSF walls made of welded HFC sections. The authors have developed a wide range of fire performance data of LSF walls through a finite element analysis (FEA) based extensive parametric study. This paper investigates the applicability of the available fire design rules to predict their structural capacities. Since fire design rules were not available for HFC sections, the latest design rules for LCS studs subjected to non-uniform temperature distributions were selected for evaluation from the pool of various design rules given in standards and previous studies. Suitable modifications were then incorporated for simplification and improved accuracy. Two improved design methods based on AS/NZS 4600 and Eurocode 3 were proposed. The structural capacity of HFC section stud found from the design rule predictions was converted into load ratio which is the ratio between the structural capacities under fire and ambient conditions, and the load ratio versus FRR curve were produced for different LSF walls. These were then compared with the FEA results, to verify the accuracy of the proposed design rules. This paper also presents suitable DSM based design method proposed for HFC section studs subject to non-uniform temperature distributions in LSF walls, and verifies its accuracy.

Impact and interest:

1 citations in Scopus
Search Google Scholar™
1 citations in Web of Science®

Citation counts are 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.

ID Code: 96260
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Cold-formed steel structures, LSF walls, Hollow flange channel sections, Non-uniform temperature distribution, Effective width method, Direct strength method
DOI: 10.1016/j.tws.2016.05.022
ISSN: 0263-8231
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2016 Elsevier B.V.
Deposited On: 19 Jun 2016 22:20
Last Modified: 06 Oct 2016 05:08

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page