Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Design optimisation for cold-formed steel residential roof truss using genetic algorithm

    Access Status
    Fulltext not available
    Authors
    Kok, K.
    Lau, Hieng Ho
    Phan, T.
    Ting, T.
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Kok, K. and Lau, H.H. and Phan, T. and Ting, T. 2018. Design optimisation for cold-formed steel residential roof truss using genetic algorithm. World Journal of Engineering. 15 (5): pp. 575-583.
    Source Title
    World Journal of Engineering
    DOI
    10.1108/WJE-10-2017-0322
    ISSN
    1708-5284
    School
    Curtin Malaysia
    URI
    http://hdl.handle.net/20.500.11937/74828
    Collection
    • Curtin Research Publications
    Abstract

    © 2018, Emerald Publishing Limited. Purpose: This paper aims to present the design optimisation using genetic algorithm (GA) to achieve the highest strength to weight (S/W) ratio, for cold-formed steel residential roof truss. Design/methodology/approach: The GA developed in this research simultaneously optimises roof pitch, truss configurations, joint coordinates and applied loading of typical dual-pitched symmetrical residential roof truss. The residential roof truss was considered with incremental uniform distributed loading, in both gravitational and uplift directions. The structural analyses of trusses were executed in this GA using finite element toolbox. The ultimate strength and serviceability of trusses were checked through the design formulation implemented in GA, according to the Australian standard, AS/NZS 4600 Cold-formed Steel Structures. Findings: An optimum double-Fink roof truss which possess highest S/W ratio using GA was determined, with optimum roof pitch of 15°. The optimised roof truss is suitable for industrial application with its higher S/W ratio and cost-effectiveness. The combined methodology of multi-level optimisation and simultaneous optimisation developed in this research could determine optimum roof truss with consistent S/W ratio, although with huge GA search space. Research limitations/implications: The sizing of roof truss member is not optimised in this paper. Only single type of cold-formed steel section is used throughout the whole optimisation. The design of truss connection is not considered in this paper. The corresponding connection costs are not included in the proposed optimisation. Practical implications: The optimum roof truss presented in this paper is suitable for industrial application with higher S/W ratio and lower cost, in either gravitational or uplift loading configurations. Originality/value: This research demonstrates the approaches in combining multi-level optimisation and simultaneous optimisation to handle large number of variables and hence executed an efficient design optimisation. The GA designed in this research determines the optimum residential roof truss with highest S/W ratio, instead of lightest truss weight in previous studies.

    Related items

    Showing items related by title, author, creator and subject.

    • Effect of thickness on the behaviour of axially loaded back-to-back cold-formed steel built-up channel sections - Experimental and numerical investigation
      Roy, K.; Ting, T.; Lau, Hieng Ho; Lim, J. (2018)
      © 2018 Institution of Structural Engineers In cold-formed steel structures, such as trusses, wall frames and portal frames, the use of back-to-back built-up cold-formed steel channel sections are becoming increasingly ...
    • Use of thin-gauge galvanized C-purlin sections in long-span roof truss construction
      Chiew, S.; Mei, C.; Lau, Hieng Ho (2010)
      Cold-formed thin-gauge galvanized steel lipped C-sections are widely used as secondary structural elements such as purlins and side rails in building construction because of its low weight and ease of handling and erection. ...
    • Compression Test on Cold-Formed Steel Built-up Back-to-Back Channels Stub Columns
      Ting, Chui Huon Tina; Lau, Hieng Ho (2011)
      Built-up sections are used to resist load induced in a structure when a single section is not sufficient to carry the design load for example roof trusses. In current North American Specification, the provision has been ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.