Global optimization of cold-formed steel channel sections

Tuan Tran, Long yuan Li*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Cold-formed steel sections have an important advantage which is the great flexibility of cross-sectional profiles and sizes available to structural steel designers. However, this flexibility makes the selection of the most economical section difficult for a particular situation. This paper presents a global optimization method for designing the cross-section of channel beams subjected to uniformly distributed transverse loading. The optimization of the cross-section is performed using the trust-region method (TRM) based on the failure modes of yielding strength, deflection limitation, local buckling, distortional buckling and lateral-torsional buckling. Numerical examples include the comparisons of the optimized sections obtained based on the applications of BS 5950-5 standard and the recently developed ENV-1993-1-3.

Original languageEnglish
Pages (from-to)399-406
Number of pages8
JournalThin-Walled Structures
Volume44
Issue number4
DOIs
Publication statusPublished - 1 Apr 2006

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Global optimization
Buckling
Steel
Failure modes

Keywords

  • Algorithms
  • Cold-formed
  • Optimization
  • Steel channel

Cite this

Tran, Tuan ; Li, Long yuan. / Global optimization of cold-formed steel channel sections. In: Thin-Walled Structures. 2006 ; Vol. 44, No. 4. pp. 399-406.
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Global optimization of cold-formed steel channel sections. / Tran, Tuan; Li, Long yuan.

In: Thin-Walled Structures, Vol. 44, No. 4, 01.04.2006, p. 399-406.

Research output: Contribution to journalArticle

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AB - Cold-formed steel sections have an important advantage which is the great flexibility of cross-sectional profiles and sizes available to structural steel designers. However, this flexibility makes the selection of the most economical section difficult for a particular situation. This paper presents a global optimization method for designing the cross-section of channel beams subjected to uniformly distributed transverse loading. The optimization of the cross-section is performed using the trust-region method (TRM) based on the failure modes of yielding strength, deflection limitation, local buckling, distortional buckling and lateral-torsional buckling. Numerical examples include the comparisons of the optimized sections obtained based on the applications of BS 5950-5 standard and the recently developed ENV-1993-1-3.

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