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Article: Finite Element Analysis and Design of Cold-formed Steel Built-up Closed Section Columns with Web Stiffeners

TitleFinite Element Analysis and Design of Cold-formed Steel Built-up Closed Section Columns with Web Stiffeners
Authors
KeywordsBuilt-up closed sections
Cold-formed steel
Columns
Flexural buckling
Web stiffeners
Issue Date2018
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/tws
Citation
Thin-Walled Structures, 2018, v. 131, p. 223-237 How to Cite?
AbstractThis paper presents a numerical investigation and design of cold-formed steel built-up closed section columns with web stiffeners. A finite element model (FEM), considering the initial geometric imperfections and nonlinear material properties, was developed to simulate the structural behaviour of fixed-ended built-up closed section compression members. The comparison between the numerical results and the available test results show that this FEM can provide good predictions for both the ultimate strength and the failure modes of the test specimens. The verified FEM was used to conduct an extensive parametric study for the investigation on the structural behaviour of cold-formed steel built-up closed sections with web stiffeners. The parametric study was designed to investigate the effect of web stiffeners as well as to evaluate the current design method. The column strengths obtained from the finite element analysis and the test results were compared with the design strengths calculated using the direct strength method in the North American Specification and the Australian/New Zealand Standard for cold-formed steel structures. Design curves modified from the current direct strength method are proposed for flexural, local and distortional buckling. The reliability analysis was used to assess the current design rules and the modified design curves. It is shown that the modified direct strength method is generally conservative and reliable for the design of cold-formed steel built-up closed section compression members.
Persistent Identifierhttp://hdl.handle.net/10722/259201
ISSN
2023 Impact Factor: 5.7
2023 SCImago Journal Rankings: 1.527
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhang, JH-
dc.contributor.authorYoung, B-
dc.date.accessioned2018-09-03T04:03:04Z-
dc.date.available2018-09-03T04:03:04Z-
dc.date.issued2018-
dc.identifier.citationThin-Walled Structures, 2018, v. 131, p. 223-237-
dc.identifier.issn0263-8231-
dc.identifier.urihttp://hdl.handle.net/10722/259201-
dc.description.abstractThis paper presents a numerical investigation and design of cold-formed steel built-up closed section columns with web stiffeners. A finite element model (FEM), considering the initial geometric imperfections and nonlinear material properties, was developed to simulate the structural behaviour of fixed-ended built-up closed section compression members. The comparison between the numerical results and the available test results show that this FEM can provide good predictions for both the ultimate strength and the failure modes of the test specimens. The verified FEM was used to conduct an extensive parametric study for the investigation on the structural behaviour of cold-formed steel built-up closed sections with web stiffeners. The parametric study was designed to investigate the effect of web stiffeners as well as to evaluate the current design method. The column strengths obtained from the finite element analysis and the test results were compared with the design strengths calculated using the direct strength method in the North American Specification and the Australian/New Zealand Standard for cold-formed steel structures. Design curves modified from the current direct strength method are proposed for flexural, local and distortional buckling. The reliability analysis was used to assess the current design rules and the modified design curves. It is shown that the modified direct strength method is generally conservative and reliable for the design of cold-formed steel built-up closed section compression members.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/tws-
dc.relation.ispartofThin-Walled Structures-
dc.subjectBuilt-up closed sections-
dc.subjectCold-formed steel-
dc.subjectColumns-
dc.subjectFlexural buckling-
dc.subjectWeb stiffeners-
dc.titleFinite Element Analysis and Design of Cold-formed Steel Built-up Closed Section Columns with Web Stiffeners-
dc.typeArticle-
dc.identifier.emailYoung, B: young@hku.hk-
dc.identifier.authorityYoung, B=rp00208-
dc.identifier.doi10.1016/j.tws.2018.06.008-
dc.identifier.scopuseid_2-s2.0-85049779051-
dc.identifier.hkuros289006-
dc.identifier.volume131-
dc.identifier.spage223-
dc.identifier.epage237-
dc.identifier.isiWOS:000445311400017-
dc.publisher.placeUnited Kingdom-
dc.identifier.issnl0263-8231-

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