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Article: Behavior and design of cold-formed and hot-finished steel elliptical tubular stub columns

TitleBehavior and design of cold-formed and hot-finished steel elliptical tubular stub columns
Authors
KeywordsCold-formed
Direct strength method
Elliptical hollow section
Hot-finished
Stub column
Issue Date2019
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jcsr
Citation
Journal of Constructional Steel Research, 2019, v. 156, p. 252-265 How to Cite?
AbstractSignificant progress has been made on structural behavior of hot-finished (HF) steel members with elliptical hollow sections (EHS) in the past few years. However, there is very limited research on cold-formed (CF) steel members with EHS. In this study, both CF and HF steel elliptical tubular stub columns are investigated. The investigation includes laboratory testing, numerical analysis and design evaluations. The geometric imperfection measurements, full load-end shortening relationships and load-strain curves of the stub columns are detailed in this paper. A non-linear finite element model was developed and validated against test results obtained from the present study as well as from the literature. The validated numerical model was employed to perform an extensive parametric study, where the CF and HF stub columns with EHS were carefully designed to include a broad range of the cross-section slenderness and aspect ratio. The cold-forming effect on the CF sections was taken into account in a conservative manner. The ultimate strengths obtained from the tests and numerical analysis were compared with the predictions in the design strengths predicted by the design methods proposed in the existing literature and the Direct Strength Method (DSM). The comparisons showed that the strengths predicted by the equivalent diameter method, the DSM and the modified DSM are generally conservative and reliable. The modified DSM provides the most accurate and the least scattered predictions among these design methods. Therefore, the modified DSM is recommended for the design of CF and HF steel elliptical tubular stub columns.
Persistent Identifierhttp://hdl.handle.net/10722/272867
ISSN
2017 Impact Factor: 2.509
2015 SCImago Journal Rankings: 1.746

 

DC FieldValueLanguage
dc.contributor.authorCai, Y-
dc.contributor.authorQuach, WM-
dc.contributor.authorChen, MT-
dc.contributor.authorYoung, B-
dc.date.accessioned2019-08-06T09:18:03Z-
dc.date.available2019-08-06T09:18:03Z-
dc.date.issued2019-
dc.identifier.citationJournal of Constructional Steel Research, 2019, v. 156, p. 252-265-
dc.identifier.issn0143-974X-
dc.identifier.urihttp://hdl.handle.net/10722/272867-
dc.description.abstractSignificant progress has been made on structural behavior of hot-finished (HF) steel members with elliptical hollow sections (EHS) in the past few years. However, there is very limited research on cold-formed (CF) steel members with EHS. In this study, both CF and HF steel elliptical tubular stub columns are investigated. The investigation includes laboratory testing, numerical analysis and design evaluations. The geometric imperfection measurements, full load-end shortening relationships and load-strain curves of the stub columns are detailed in this paper. A non-linear finite element model was developed and validated against test results obtained from the present study as well as from the literature. The validated numerical model was employed to perform an extensive parametric study, where the CF and HF stub columns with EHS were carefully designed to include a broad range of the cross-section slenderness and aspect ratio. The cold-forming effect on the CF sections was taken into account in a conservative manner. The ultimate strengths obtained from the tests and numerical analysis were compared with the predictions in the design strengths predicted by the design methods proposed in the existing literature and the Direct Strength Method (DSM). The comparisons showed that the strengths predicted by the equivalent diameter method, the DSM and the modified DSM are generally conservative and reliable. The modified DSM provides the most accurate and the least scattered predictions among these design methods. Therefore, the modified DSM is recommended for the design of CF and HF steel elliptical tubular stub columns.-
dc.languageeng-
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jcsr-
dc.relation.ispartofJournal of Constructional Steel Research-
dc.subjectCold-formed-
dc.subjectDirect strength method-
dc.subjectElliptical hollow section-
dc.subjectHot-finished-
dc.subjectStub column-
dc.titleBehavior and design of cold-formed and hot-finished steel elliptical tubular stub columns-
dc.typeArticle-
dc.identifier.emailCai, Y: yccai@hku.hk-
dc.identifier.emailChen, MT: cmt111@connect.hku.hk-
dc.identifier.emailYoung, B: young@hku.hk-
dc.identifier.authorityYoung, B=rp00208-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jcsr.2019.02.006-
dc.identifier.scopuseid_2-s2.0-85061821671-
dc.identifier.hkuros299842-
dc.identifier.volume156-
dc.identifier.spage252-
dc.identifier.epage265-
dc.publisher.placeUnited Kingdom-

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