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2019•QUT ePrints (Queensland University of Technology)Open access

Load-bearing walls made of cold-formed steel hollow section studs exposed to fire

Yunxiang Tao, Mahen Mahendran, Anthony Deloge Ariyanayagam

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Abstract

Light gauge steel frame (LSF) walls are used as primary load-bearing components in cold -formed steel (CFS) buildings. With the use of CFS structures in the construction of mid-rise buildings, fire safety of LSF walls has become a more critical issue for designers. This research project has investigated the fire performance of LSF walls made of cold-formed square hollows section (SHS) studs.A full-scale fire test was first conducted under standard fire conditions, and finite element (FE) models were then developed and validated. This paper presents the details of the fire test and FE modelling of SHS stud wall in fire and the results. Detailed comparisons between the results from the fire test and FE modelling, such as time-temperature profiles of SHS studs and plasterboards, fire resistance level of the LSF wall, stud failure mode and deflections, are also presented in the paper.

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What this paper is about

Light gauge steel frame (LSF) walls are used as primary load-bearing components in cold -formed steel (CFS) buildings. With the use of CFS structures in the construction of mid-rise buildings, fire safety of LSF walls has become a more critical issue for designers. This research project has investigated the fire performance of LSF walls made of cold-formed square hollows section (SHS) studs.A full-scale fire test was first conducted under standard fire conditions, and finite element (FE) models were then developed and validated. This paper presents the details of the fire test and FE modelling of SHS stud wall in fire and the results. Detailed comparisons between the results from the fire test and FE modelling, such as time-temperature profiles of SHS studs and plasterboards, fire resistance level of the LSF wall, stud failure mode and deflections, are also presented in the paper.

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Available abstract

Light gauge steel frame (LSF) walls are used as primary load-bearing components in cold -formed steel (CFS) buildings. With the use of CFS structures in the construction of mid-rise buildings, fire safety of LSF walls has become a more critical issue for designers. This research project has investigated the fire performance of LSF walls made of cold-formed square hollows section (SHS) studs.A full-scale fire test was first conducted under standard fire conditions, and finite element (FE) models were then developed and validated. This paper presents the details of the fire test and FE modelling of SHS stud wall in fire and the results. Detailed comparisons between the results from the fire test and FE modelling, such as time-temperature profiles of SHS studs and plasterboards, fire resistance level of the LSF wall, stud failure mode and deflections, are also presented in the paper.

Key concepts: Fire test, Fire resistance, Structural engineering, Cold-formed steel, Fire performance, Load bearing, Engineering, Full scale

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