Optimal design of cold-formed steel portal frames for stressed-skin action using genetic algorithm

Duoc T. Phan , James B.P. Lim, Tiku T. Tanyimboh, Andrzej Wrzesien, Wei Sha, R. M. Lawson

Research output: Contribution to journalArticle

Abstract

This paper describes a stressed-skin diaphragm approach to the optimal design of the internal frame of a cold-formed steel portal framing system, in conjunction with the effect of semi-rigid joints. Both ultimate and serviceability limit states are considered. Wind load combinations are included. The designs are optimized using a real-coded niching genetic algorithm, in which both discrete and continuous decision variables are processed. For a building with two internal frames, it is shown that the material cost of the internal frame can be reduced by as much as 53%, compared with a design that ignores stressed-skin action.

Original languageEnglish
Pages (from-to)36-49
JournalEngineering Structures
Volume93
DOIs
Publication statusPublished - 15 Jun 2015
Externally publishedYes

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Skin
Genetic algorithms
Steel
Diaphragms
Costs
Optimal design

Cite this

Phan , Duoc T. ; Lim, James B.P. ; Tanyimboh, Tiku T. ; Wrzesien, Andrzej ; Sha, Wei ; Lawson, R. M. / Optimal design of cold-formed steel portal frames for stressed-skin action using genetic algorithm. In: Engineering Structures. 2015 ; Vol. 93. pp. 36-49.
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Optimal design of cold-formed steel portal frames for stressed-skin action using genetic algorithm. / Phan , Duoc T.; Lim, James B.P.; Tanyimboh, Tiku T.; Wrzesien, Andrzej; Sha, Wei; Lawson, R. M.

In: Engineering Structures, Vol. 93, 15.06.2015, p. 36-49.

Research output: Contribution to journalArticle

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AU - Sha, Wei

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