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    Nonlinear behavior of axially loaded back-to-back built-up cold-formed steel un-lipped channel sections

    Access Status
    Fulltext not available
    Authors
    Roy, K.
    Ting, T.
    Lau, Hieng Ho
    Lim, J.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Roy, K. and Ting, T. and Lau, H.H. and Lim, J. 2018. Nonlinear behavior of axially loaded back-to-back built-up cold-formed steel un-lipped channel sections. Steel and Composite Structures. 28 (2): pp. 233-250.
    Source Title
    Steel and Composite Structures
    DOI
    10.12989/scs.2018.28.2.233
    ISSN
    1229-9367
    School
    Curtin Malaysia
    URI
    http://hdl.handle.net/20.500.11937/72658
    Collection
    • Curtin Research Publications
    Abstract

    Copyright © 2018 Techno-Press, Ltd. Back-to-back built-up cold-formed steel un-lipped channel sections are used in cold-formed steel structures; such as trusses, wall frames and portal frames. In such built-up columns, intermediate fasteners resist the buckling of individual channel-sections. No experimental tests or finite element analyses have been reported in the literature for back-to-back built-up cold-formed steel un-lipped channel sections and specially investigated the effect of screw spacing on axial strength of such columns. The issue is addressed in this paper. The results of 95 finite element analyses are presented covering stub to slender columns. The finite element model is validated against the experimental tests recently conducted by authors for back-to-back built-up cold-formed steel lipped channel sections. The verified finite element model is then used for the purposes of a parametric study to investigate the effect of screw spacing on axial strength of back-to-back built-up cold-formed steel un-lipped channel sections. Results are compared against the built-up lipped channel sections and it is shown that the axial strength of un-lipped built-up sections are 31% lesser on average than the built-up lipped channel sections. It was also found that the American Iron and Steel Institute (AISI) and the Australian and New Zealand Standards were over-conservative by around 15% for built-up columns failed through overall buckling, however AISI and AS/NZS were un-conservative by around 8% for built-up columns mainly failed by local buckling.

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    • 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 ...
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      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 for the column members is becoming increasingly popular. In such an ...
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      Researchers have noticed the advantages of utilizing built-up sections in steel structures. Several studies have shown that the performance of a structure is improved using built-up sections. Current industry design has ...
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