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Article: Use of analytical lateral-axial strain relation in FE analysis of axially loaded rectangular CFST columns

TitleUse of analytical lateral-axial strain relation in FE analysis of axially loaded rectangular CFST columns
Authors
KeywordsConcrete confinement
Concrete-filled steel tube (CFST)
Finite element analysis
Triaxial stress state
Issue Date2018
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/engstruct
Citation
Engineering Structures, 2018, v. 166, p. 142-151 How to Cite?
AbstractIn a rectangular concrete-filled steel tube (CFST) column under axial compression, the concrete is under non-uniform and anisotropic confining stresses. To simulate such complicated triaxial stress field, finite element (FE) modelling is an effective tool. However, most previous FE models based on the plasticity theory augmented with associated or non-associated flow rules significantly underestimate the lateral and volumetric expansions of concrete at the inelastic stage and thus require solution dependent adjustments for compensation. Herein, an analytical lateral-axial strain relation of confined concrete derived from regression analysis of published experimental results is incorporated in a new FE model for the analysis of axial loaded rectangular CFST columns. This analytical lateral-axial strain relation allows direct evaluation of the lateral strains and should more accurately predict the lateral and volumetric expansions of confined concrete than the plasticity theory. The new FE model is applied to analyse tested specimens in the literature for verification and then used in a parametric study to evaluate the ductility of axially loaded rectangular CFST columns with different structural parameters.
Persistent Identifierhttp://hdl.handle.net/10722/264571
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.accessioned2018-10-22T07:57:11Z-
dc.date.available2018-10-22T07:57:11Z-
dc.date.issued2018-
dc.identifier.citationEngineering Structures, 2018, v. 166, p. 142-151-
dc.identifier.issn0141-0296-
dc.identifier.urihttp://hdl.handle.net/10722/264571-
dc.description.abstractIn a rectangular concrete-filled steel tube (CFST) column under axial compression, the concrete is under non-uniform and anisotropic confining stresses. To simulate such complicated triaxial stress field, finite element (FE) modelling is an effective tool. However, most previous FE models based on the plasticity theory augmented with associated or non-associated flow rules significantly underestimate the lateral and volumetric expansions of concrete at the inelastic stage and thus require solution dependent adjustments for compensation. Herein, an analytical lateral-axial strain relation of confined concrete derived from regression analysis of published experimental results is incorporated in a new FE model for the analysis of axial loaded rectangular CFST columns. This analytical lateral-axial strain relation allows direct evaluation of the lateral strains and should more accurately predict the lateral and volumetric expansions of confined concrete than the plasticity theory. The new FE model is applied to analyse tested specimens in the literature for verification and then used in a parametric study to evaluate the ductility of axially loaded rectangular CFST columns with different structural parameters.-
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.subjectTriaxial stress state-
dc.titleUse of analytical lateral-axial strain relation in FE analysis of axially loaded rectangular CFST columns-
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.2018.03.068-
dc.identifier.scopuseid_2-s2.0-85044567225-
dc.identifier.hkuros293789-
dc.identifier.volume166-
dc.identifier.spage142-
dc.identifier.epage151-
dc.identifier.isiWOS:000433268500011-
dc.publisher.placeUnited Kingdom-

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