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Article: Finite element analysis of square concrete-filled steel tube (CFST) columns under axial compressive load

TitleFinite element analysis of square concrete-filled steel tube (CFST) columns under axial compressive load
Authors
KeywordsConcrete confinement
Concrete-filled steel tube (CFST)
Finite element analysis
Square CFST
Issue Date2018
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/engstruct
Citation
Engineering Structures, 2018, v. 156, p. 443-459 How to Cite?
AbstractThe confinement provided in concrete-filled steel tube (CFST) columns can significantly increase the strength and ductility of the concrete columns. However, in non-circular CSFT, the confining stresses are non-uniform and anisotropic, making their incorporation in structural analysis and design fairly difficult. Herein, a novel finite element (FE) model, which takes into account the lateral expansion and triaxial behaviour of the confined concrete, plastic behaviour of the steel tube and interaction at the concrete-steel tube interface in the evaluation of the confining stress field, is developed. It is applied to analyse a total of 92 axially loaded square CFST specimens published in the literature with concrete cylinder strength ranging from 24 to 110 MPa, steel yield strength from 262 to 835 MPa and steel tube depth-to-thickness ratio from 18 to 102. Overall, the FE analysis yielded full-range load-strain curves in good agreement with the experimental results. Using the new FE model, parametric studies on the effects of corner radius have been conducted and it is found that increasing the corner radius would produce better confinement at post-peak stage and thus would improve the post-peak behaviour of square CFST columns.
Persistent Identifierhttp://hdl.handle.net/10722/264000
ISSN
2017 Impact Factor: 2.755
2015 SCImago Journal Rankings: 1.813
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorOuyang, Y-
dc.contributor.authorKwan, AKH-
dc.date.accessioned2018-10-22T07:47:55Z-
dc.date.available2018-10-22T07:47:55Z-
dc.date.issued2018-
dc.identifier.citationEngineering Structures, 2018, v. 156, p. 443-459-
dc.identifier.issn0141-0296-
dc.identifier.urihttp://hdl.handle.net/10722/264000-
dc.description.abstractThe confinement provided in concrete-filled steel tube (CFST) columns can significantly increase the strength and ductility of the concrete columns. However, in non-circular CSFT, the confining stresses are non-uniform and anisotropic, making their incorporation in structural analysis and design fairly difficult. Herein, a novel finite element (FE) model, which takes into account the lateral expansion and triaxial behaviour of the confined concrete, plastic behaviour of the steel tube and interaction at the concrete-steel tube interface in the evaluation of the confining stress field, is developed. It is applied to analyse a total of 92 axially loaded square CFST specimens published in the literature with concrete cylinder strength ranging from 24 to 110 MPa, steel yield strength from 262 to 835 MPa and steel tube depth-to-thickness ratio from 18 to 102. Overall, the FE analysis yielded full-range load-strain curves in good agreement with the experimental results. Using the new FE model, parametric studies on the effects of corner radius have been conducted and it is found that increasing the corner radius would produce better confinement at post-peak stage and thus would improve the post-peak behaviour of square CFST columns.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/engstruct-
dc.relation.ispartofEngineering Structures-
dc.subjectConcrete confinement-
dc.subjectConcrete-filled steel tube (CFST)-
dc.subjectFinite element analysis-
dc.subjectSquare CFST-
dc.titleFinite element analysis of square concrete-filled steel tube (CFST) columns under axial compressive load-
dc.typeArticle-
dc.identifier.emailKwan, AKH: khkwan@hkucc.hku.hk-
dc.identifier.authorityKwan, AKH=rp00127-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.engstruct.2017.11.055-
dc.identifier.scopuseid_2-s2.0-85040771174-
dc.identifier.hkuros293783-
dc.identifier.volume156-
dc.identifier.spage443-
dc.identifier.epage459-
dc.identifier.isiWOS:000429754400036-
dc.publisher.placeUnited Kingdom-

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