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  • Review of Current Fire Design Rules for Cold-formed Steel Wall Systems

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    Author(s)
    Gunalan, Shanmuganathan
    Mahendran, Mahen
    Griffith University Author(s)
    Gunalan, Shanmuganathan (Guna)
    Year published
    2014
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    Abstract
    Light gauge steel frame (LSF) wall systems are commonly used in industrial and commercial buildings and there is a need for simple fire design rules to predict their load capacities and fire resistance ratings. During fire events, the LSF wall studs are subjected to non-uniform temperature distributions that cause thermal bowing, neutral axis shift and magnification effects and thus resulting in a combined axial compression and bending action on the studs. In this research a series of full scale fire tests was conducted first to evaluate the performance of LSF wall systems with eight different wall configurations under ...
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    Light gauge steel frame (LSF) wall systems are commonly used in industrial and commercial buildings and there is a need for simple fire design rules to predict their load capacities and fire resistance ratings. During fire events, the LSF wall studs are subjected to non-uniform temperature distributions that cause thermal bowing, neutral axis shift and magnification effects and thus resulting in a combined axial compression and bending action on the studs. In this research a series of full scale fire tests was conducted first to evaluate the performance of LSF wall systems with eight different wall configurations under standard fire conditions. Finite element models of LSF walls were then developed, analysed under transient and steady state conditions, and validated using full scale fire tests. Using the results from fire tests and finite element analyses, a detailed investigation was undertaken into the prediction of axial compression strength and failure times of LSF wall studs in standard fires using the available fire design rules based on Australian, American and European standards. The results from both fire tests and finite element analyses were used to investigate the ability of these fire design rules to include the complex effects of non-uniform temperature distributions and their accuracy in predicting the axial compression strength of wall studs and the failure times. The measured time-temperature profiles in the fire tests were used in all the calculations. Suitable modifications were then proposed to the fire design rules. This paper presents the details of this investigation on the fire design rules of LSF walls and the results.
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    Journal Title
    Journal of Fire Sciences
    Volume
    32
    Issue
    1
    DOI
    https://doi.org/10.1177/0734904113488336
    Copyright Statement
    © 2014 SAGE Publications. This is the author-manuscript version of the paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
    Subject
    Structural engineering
    Materials engineering
    Publication URI
    http://hdl.handle.net/10072/69235
    Collection
    • Journal articles

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