Numerical modelling of load bearing light gauge steel frame wall systems exposed to realistic design fires


Autoria(s): Ariyanayagam, Anthony Deloge; Mahendran, Mahen
Data(s)

28/02/2014

Resumo

Fire safety has become an important part in structural design due to the ever increasing loss of properties and lives during fires. Conventionally the fire rating of load bearing wall systems made of Light gauge Steel Frames (LSF) is determined using fire tests based on the standard time-temperature curve in ISO834 [1]. However, modern commercial and residential buildings make use of thermoplastic materials, which mean considerably high fuel loads. Hence a detailed fire research study into the fire performance of LSF walls was undertaken using realistic design fire curves developed based on Eurocode parametric [2] and Barnett’s BFD [3] curves using both full scale fire tests and numerical studies. It included LSF walls without cavity insulation, and the recently developed externally insulated composite panel system. This paper presents the details of finite element models developed to simulate the full scale fire tests of LSF wall panels under realistic design fires. Finite element models of LSF walls exposed to realistic design fires were developed, and analysed under both transient and steady state fire conditions using the measured stud time-temperature curves. Transient state analyses were performed to simulate fire test conditions while steady state analyses were performed to obtain the load ratio versus time and failure temperature curves of LSF walls. Details of the developed finite element models and the results including the axial deformation and lateral deflection versus time curves, and the stud failure modes and times are presented in this paper. Comparison with fire test results demonstrate the ability of developed finite element models to predict the performance and fire resistance ratings of LSF walls under realistic design fires.

Formato

application/pdf

Identificador

http://eprints.qut.edu.au/67941/

Publicador

Elsevier

Relação

http://eprints.qut.edu.au/67941/4/67941%28author%29.pdf

DOI:10.1016/j.tws.2014.01.003

Ariyanayagam, Anthony Deloge & Mahendran, Mahen (2014) Numerical modelling of load bearing light gauge steel frame wall systems exposed to realistic design fires. Thin-Walled Structures, 78, pp. 148-170.

Direitos

Copyright 2014 Elsevier

This is the author’s version of a work that was accepted for publication in Thin-Walled Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Thin-Walled Structures, [VOL 78, (2014)] DOI: 10.1016/j.tws.2014.01.003

Fonte

School of Civil Engineering & Built Environment; Science & Engineering Faculty

Palavras-Chave #090500 CIVIL ENGINEERING #Finite element analysis #Realistic design fires #Light gauge steel frame walls #Load bearing walls #Buckling #Fire resistance rating
Tipo

Journal Article