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Article: Numerical simulation of concrete encased steel composite columns

TitleNumerical simulation of concrete encased steel composite columns
Authors
KeywordsComposite columns
Concrete encased steel
Finite element
High strength
Modelling
Pin-ended
Structural design
Issue Date2011
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jcsr
Citation
Journal Of Constructional Steel Research, 2011, v. 67 n. 2, p. 211-222 How to Cite?
AbstractThis paper investigates the behaviour of pin-ended axially loaded concrete encased steel composite columns. A nonlinear 3-D finite element model was developed to analyse the inelastic behaviour of steel, concrete, longitudinal and transverse reinforcement bars as well as the effect of concrete confinement of the concrete encased steel composite columns. The interface between the steel section and concrete, the longitudinal and transverse reinforcement bars, and the reinforcement bars and concrete were also considered that allowed the bond behaviour to be modeled and the different components to retain their profile during the deformation of the column. Furthermore, the initial overall (out-of-straightness) geometric imperfection was carefully incorporated in the model. The finite element model has been validated against published experimental results. The main objective of the study was to understand the structural response and modes of failure of the columns and to assess the composite column strengths against current design codes. The study covered slender, non-slender, stub and long concrete encased steel composite columns. The concrete strengths varied from normal to high strength (20110 MPa). The steel section yield stresses also varied from normal to high strength (275690 MPa). Furthermore, the variables that influence the composite column behaviour and strength comprising different slenderness ratios, concrete strength and steel yield stress were investigated in a parametric study. It is shown that the increase in structural steel strength has a small effect on the composite column strength for the columns having higher relative slenderness ratios due to the flexural buckling failure mode. The composite column strengths obtained from the finite element analysis were compared with the design strengths calculated using the American Institute for Steel Construction AISC and Eurocode 4 for composite columns. Generally, it is shown that the EC 4 accurately predicted the design strength for the concrete encased steel composite columns having a concrete cylinder strength of 30 MPa and structural steel yield stresses of 275 and 460 MPa, which are in the limits of the code, which otherwise, was generally conservative. The AISC predictions were quite conservative for all the concrete encased steel composite columns. © 2010 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/139108
ISSN
2015 Impact Factor: 1.702
2015 SCImago Journal Rankings: 1.746
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorEllobody, Een_HK
dc.contributor.authorYoung, Ben_HK
dc.date.accessioned2011-09-23T05:45:00Z-
dc.date.available2011-09-23T05:45:00Z-
dc.date.issued2011en_HK
dc.identifier.citationJournal Of Constructional Steel Research, 2011, v. 67 n. 2, p. 211-222en_HK
dc.identifier.issn0143-974Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/139108-
dc.description.abstractThis paper investigates the behaviour of pin-ended axially loaded concrete encased steel composite columns. A nonlinear 3-D finite element model was developed to analyse the inelastic behaviour of steel, concrete, longitudinal and transverse reinforcement bars as well as the effect of concrete confinement of the concrete encased steel composite columns. The interface between the steel section and concrete, the longitudinal and transverse reinforcement bars, and the reinforcement bars and concrete were also considered that allowed the bond behaviour to be modeled and the different components to retain their profile during the deformation of the column. Furthermore, the initial overall (out-of-straightness) geometric imperfection was carefully incorporated in the model. The finite element model has been validated against published experimental results. The main objective of the study was to understand the structural response and modes of failure of the columns and to assess the composite column strengths against current design codes. The study covered slender, non-slender, stub and long concrete encased steel composite columns. The concrete strengths varied from normal to high strength (20110 MPa). The steel section yield stresses also varied from normal to high strength (275690 MPa). Furthermore, the variables that influence the composite column behaviour and strength comprising different slenderness ratios, concrete strength and steel yield stress were investigated in a parametric study. It is shown that the increase in structural steel strength has a small effect on the composite column strength for the columns having higher relative slenderness ratios due to the flexural buckling failure mode. The composite column strengths obtained from the finite element analysis were compared with the design strengths calculated using the American Institute for Steel Construction AISC and Eurocode 4 for composite columns. Generally, it is shown that the EC 4 accurately predicted the design strength for the concrete encased steel composite columns having a concrete cylinder strength of 30 MPa and structural steel yield stresses of 275 and 460 MPa, which are in the limits of the code, which otherwise, was generally conservative. The AISC predictions were quite conservative for all the concrete encased steel composite columns. © 2010 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_US
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jcsren_HK
dc.relation.ispartofJournal of Constructional Steel Researchen_HK
dc.subjectComposite columnsen_HK
dc.subjectConcrete encased steelen_HK
dc.subjectFinite elementen_HK
dc.subjectHigh strengthen_HK
dc.subjectModellingen_HK
dc.subjectPin-endeden_HK
dc.subjectStructural designen_HK
dc.titleNumerical simulation of concrete encased steel composite columnsen_HK
dc.typeArticleen_HK
dc.identifier.emailYoung, B:young@hku.hken_HK
dc.identifier.authorityYoung, B=rp00208en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jcsr.2010.08.003en_HK
dc.identifier.scopuseid_2-s2.0-77957284755en_HK
dc.identifier.hkuros196389en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77957284755&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume67en_HK
dc.identifier.issue2en_HK
dc.identifier.spage211en_HK
dc.identifier.epage222en_HK
dc.identifier.isiWOS:000283893100007-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridEllobody, E=8280203300en_HK
dc.identifier.scopusauthoridYoung, B=7402192398en_HK
dc.identifier.citeulike7892097-

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