Cross-sectional optimization of cold-formed steel channels to Eurocode 3
Ma, Weixin and Becque, Jurgen and Hajirasouliha, Iman and Ye, Jun (2015) Cross-sectional optimization of cold-formed steel channels to Eurocode 3. Engineering Structures, 101. pp. 641-651. ISSN 0141-0296 (https://doi.org/10.1016/j.engstruct.2015.07.051)
Preview |
Text.
Filename: Ma_etal_ES_2015_Cross_sectional_optimization_cold_formed_steel_channels.pdf
Accepted Author Manuscript License: Download (1MB)| Preview |
Abstract
Cold-formed steel structural systems are widely used in modern construction. However, identifying optimal cross section geometries for cold-formed steel elements is a complex problem, since the strength of these members is controlled by combinations of local, distortional, and global buckling. This paper presents a procedure to obtain optimized steel channel cross-sections for use in compression or bending. A simple lipped C-shape is taken as a starting point, but the optimization process allows for the addition of double-fold (return) lips, inclined lips and triangular web stiffeners. The cross-sections are optimized with respect to their structural capacity, determined according to the relevant Eurocode (EN1993-1-3), using genetic algorithms. All plate slenderness limit values and all limits on the relative dimensions of the cross-sectional components, set by the Eurocode, are thereby taken into account as constraints on the optimization problem. The optimization for compression is carried out for different column lengths and includes the effects of the shift of the effective centroid induced by local buckling. Detailed finite element models are used to confirm the relative gains in capacity obtained through the optimization process.
-
-
Item type: Article ID code: 81100 Dates: DateEvent15 October 2015Published13 August 2015Published Online31 July 2015AcceptedSubjects: Technology > Engineering (General). Civil engineering (General) Department: Faculty of Engineering > Civil and Environmental Engineering Depositing user: Pure Administrator Date deposited: 14 Jun 2022 12:40 Last modified: 09 Sep 2024 22:27 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/81100