Experimental study of load bearing cold-formed steel wall systems under fire conditions

Gunalan, Shanmuganathan, Kolarkar, Prakash Nagaraj, & Mahendran, Mahen (2013) Experimental study of load bearing cold-formed steel wall systems under fire conditions. Thin-Walled Structures, 65, pp. 72-92.

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Light Gauge Steel Framing (LSF) walls made of cold-formed and thin-walled steel lipped channel studs with plasterboard linings on both sides are commonly used in commercial, industrial and residential buildings. However, there is limited data about their structural and thermal performance under fire conditions while past research showed contradicting results about the benefits of using cavity insulation. A new composite wall panel was recently proposed to improve the fire resistance rating of LSF walls, where an insulation layer was used externally between the plasterboards on both sides of the wall frame instead of using it in the cavity. In this research 11 full scale tests were conducted on conventional load bearing steel stud walls with and without cavity insulation, and the new composite panel system to study their thermal and structural performance under standard fire conditions. These tests showed that the use of cavity insulation led to inferior fire performance of walls, and provided supporting research data. They demonstrated that the use of insulation externally in a composite panel enhanced the thermal and structural performance of LSF walls and increased their fire resistance rating. This paper presents the details of the LSF wall tests and the thermal and structural performance data and fire resistance rating of load-bearing wall assemblies lined with varying plasterboard-insulation configurations under two different load ratios. Fire test results including the time–temperature and deflection profiles are presented along with the failure times and modes.

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26 citations in Scopus
20 citations in Web of Science®
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ID Code: 60671
Item Type: Journal Article
Refereed: Yes
Funders: ARC
Keywords: Fire tests, Light gauge steel frame walls, Steel studs, Plasterboards, Standard fire, Fire resistance rating, Elevated temperature
DOI: 10.1016/j.tws.2013.01.005
ISSN: 0263-8231
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 16 Jun 2013 23:46
Last Modified: 06 Oct 2014 01:47

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