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    Effect of stressed-skin action on optimal design of cold-formed steel square and rectangular-shaped portal frame buildings

    Access Status
    Fulltext not available
    Authors
    Wrzesien, A.
    Phan, D.
    Lim, J.
    Lau, Hieng Ho
    Hajirasouliha, I.
    Tan, C.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Wrzesien, A. and Phan, D. and Lim, J. and Lau, H.H. and Hajirasouliha, I. and Tan, C. 2016. Effect of stressed-skin action on optimal design of cold-formed steel square and rectangular-shaped portal frame buildings. International Journal of Steel Structures. 16 (2): pp. 299-307.
    Source Title
    International Journal of Steel Structures
    DOI
    10.1007/s13296-016-6004-2
    ISSN
    1598-2351
    School
    Curtin Sarawak
    URI
    http://hdl.handle.net/20.500.11937/55354
    Collection
    • Curtin Research Publications
    Abstract

    © 2016, Korean Society of Steel Construction and Springer-Verlag Berlin Heidelberg.Cold-formed steel (CFS) portal frames can be a viable alternative to conventional hot-rolled steel portal frames. They are commonly used for low-rise commercial, light industrial and agricultural buildings. In this paper, the effect of stressed-skin action on the optimum design of CFS portal frames is investigated by conducting a minimum cost design optimisation on a building of span of 6 m, height-to-eaves of 3 m and frame spacing of 3 m; the effect of different number of bays are considered. For the purpose of this study, it is assumed that gables are rigid.The effect of stressed-skin action is larger for“square-shaped” buildings (i.e. when the span and length are the same on plan) and decreases as more bays are added(i.e. as the building becomes more “rectangular-shaped” on plan). The results of the minimum cost optimisation indicate that if stressed-skin action is taken into account, the cost of the internal frame can be reduced by around half for “square-shaped” buildings. It should be noted that this is a minimum cost optimisation, which is not the same as a minimum weight optimisation. It is also shown that a safe design of internal frames could be obtained by ignoring wind loads (i.e. designing the frame only for gravity loads),but this is limited to buildings having a “square-shape”.

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      A structural design optimisation has been carried out to allow for asymmetry and fully tapered portal frames. The additional weight of an asymmetric structural shape was found to be on average 5–13% with additional ...
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