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  • Improved Design Rules for Fixed Ended Cold-formed Steel Columns Subject to Flexural-torsional Buckling

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    Accepted Manuscript (AM)
    Author(s)
    Gunalan, Shanmuganathan
    Mahendran, Mahen
    Griffith University Author(s)
    Gunalan, Shanmuganathan (Guna)
    Year published
    2013
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    Abstract
    This paper has presented the details of an investigation into the flexural and flexural-torsional buckling behaviour of cold-formed structural steel columns with pinned and fixed ends. Current design rules for the member capacities of cold-formed steel columns are based on the same non-dimensional strength curve for both fixed and pinned-ended columns. This research has reviewed the accuracy of the current design rules in AS/NZS 4600 and the North American Specification in determining the member capacities of cold-formed steel columns using the results from detailed finite element analyses and an experimental study of lipped ...
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    This paper has presented the details of an investigation into the flexural and flexural-torsional buckling behaviour of cold-formed structural steel columns with pinned and fixed ends. Current design rules for the member capacities of cold-formed steel columns are based on the same non-dimensional strength curve for both fixed and pinned-ended columns. This research has reviewed the accuracy of the current design rules in AS/NZS 4600 and the North American Specification in determining the member capacities of cold-formed steel columns using the results from detailed finite element analyses and an experimental study of lipped channel columns. It was found that the current Australian and American design rules accurately predicted the member capacities of pin ended lipped channel columns undergoing flexural and flexural torsional buckling. However, for fixed ended columns with warping fixity undergoing flexural-torsional buckling, it was found that the current design rules significantly underestimated the column capacities as they disregard the beneficial effect of warping fixity. This paper has therefore proposed improved design rules and verified their accuracy using finite element analysis and test results of cold-formed lipped channel columns made of three cross-sections and five different steel grades and thicknesses.
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    Journal Title
    Thin-Walled Structures
    Volume
    73
    DOI
    https://doi.org/10.1016/j.tws.2013.06.013
    Copyright Statement
    © 2013 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Structural Engineering
    Aerospace Engineering
    Civil Engineering
    Mechanical Engineering
    Publication URI
    http://hdl.handle.net/10072/69207
    Collection
    • Journal articles

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