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

Andrzej M. Wrzesien, Duoc T. Phan, James B. P. Lim, Hieng-Ho Lau, Iman Hajirasouliha, Cher Siang Tan

Research output: Contribution to journalArticle

Abstract

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”.

Original languageEnglish
Pages (from-to)299-307
JournalInternational Journal of Steel Structures
Volume16
Issue number2
Early online date30 Jun 2016
DOIs
Publication statusE-pub ahead of print - 30 Jun 2016
Externally publishedYes

Keywords

  • cold-formed steel
  • stressed-skin action
  • design optimisation
  • portal frames

Cite this

Wrzesien, Andrzej M. ; Phan, Duoc T. ; Lim, James B. P. ; Lau, Hieng-Ho ; Hajirasouliha, Iman ; Tan, Cher Siang. / Effect of stressed-skin action on optimal design of cold-formed steel square and rectangular-shaped portal frame buildings. In: International Journal of Steel Structures. 2016 ; Vol. 16, No. 2. pp. 299-307.
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Effect of stressed-skin action on optimal design of cold-formed steel square and rectangular-shaped portal frame buildings. / Wrzesien, Andrzej M.; Phan, Duoc T.; Lim, James B. P.; Lau, Hieng-Ho; Hajirasouliha, Iman; Tan, Cher Siang.

In: International Journal of Steel Structures, Vol. 16, No. 2, 30.06.2016, p. 299-307.

Research output: Contribution to journalArticle

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AU - Wrzesien, Andrzej M.

AU - Phan, Duoc T.

AU - Lim, James B. P.

AU - Lau, Hieng-Ho

AU - Hajirasouliha, Iman

AU - Tan, Cher Siang

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