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Article: Effectiveness of adding confinement for ductility improvement of high-strength concrete columns

TitleEffectiveness of adding confinement for ductility improvement of high-strength concrete columns
Authors
KeywordsAxial load
Column
Confinement
Design formulas
Ductility
High-strength concrete
Issue Date2010
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/engstruct
Citation
Engineering Structures, 2010, v. 32 n. 3, p. 714-725 How to Cite?
AbstractThe use of high-strength concrete (HSC) can reduce the size of columns in tall buildings and save space. However, this will also reduce the flexural ductility of the columns. To restore the flexural ductility after using HSC, additional confinement has been recommended. In this paper, the effect of adding confinement on the flexural ductility of HSC columns is studied by nonlinear moment-curvature analysis taking into account the stress-path dependence of the steel reinforcement. The analytical results reveal that the addition of confinement would enhance the flexural ductility of columns by increasing the balanced steel ratio and balanced axial load level. However, the effectiveness of adding confinement to improve the flexural ductility of columns decreases as the axial load level or concrete strength increases. Finally, to evaluate the effectiveness of adding confinement, two previously derived formulas correlating the flexural ductility to various structural parameters are extended to incorporate the effect of the confining pressure. © 2009 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/124579
ISSN
2015 Impact Factor: 1.893
2015 SCImago Journal Rankings: 1.813
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHo, JCMen_HK
dc.contributor.authorLam, JYKen_HK
dc.contributor.authorKwan, AKHen_HK
dc.date.accessioned2010-10-31T10:42:22Z-
dc.date.available2010-10-31T10:42:22Z-
dc.date.issued2010en_HK
dc.identifier.citationEngineering Structures, 2010, v. 32 n. 3, p. 714-725en_HK
dc.identifier.issn0141-0296en_HK
dc.identifier.urihttp://hdl.handle.net/10722/124579-
dc.description.abstractThe use of high-strength concrete (HSC) can reduce the size of columns in tall buildings and save space. However, this will also reduce the flexural ductility of the columns. To restore the flexural ductility after using HSC, additional confinement has been recommended. In this paper, the effect of adding confinement on the flexural ductility of HSC columns is studied by nonlinear moment-curvature analysis taking into account the stress-path dependence of the steel reinforcement. The analytical results reveal that the addition of confinement would enhance the flexural ductility of columns by increasing the balanced steel ratio and balanced axial load level. However, the effectiveness of adding confinement to improve the flexural ductility of columns decreases as the axial load level or concrete strength increases. Finally, to evaluate the effectiveness of adding confinement, two previously derived formulas correlating the flexural ductility to various structural parameters are extended to incorporate the effect of the confining pressure. © 2009 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/engstructen_HK
dc.relation.ispartofEngineering Structuresen_HK
dc.subjectAxial loaden_HK
dc.subjectColumnen_HK
dc.subjectConfinementen_HK
dc.subjectDesign formulasen_HK
dc.subjectDuctilityen_HK
dc.subjectHigh-strength concreteen_HK
dc.titleEffectiveness of adding confinement for ductility improvement of high-strength concrete columnsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0141-0296&volume=32&issue=3&spage=714&epage=725&date=2010&atitle=Effectiveness+of+adding+confinement+for+ductility+improvement+of+high-strength+concrete+columnsen_HK
dc.identifier.emailHo, JCM:johnny.ho@hku.hken_HK
dc.identifier.emailKwan, AKH:khkwan@hkucc.hku.hken_HK
dc.identifier.authorityHo, JCM=rp00070en_HK
dc.identifier.authorityKwan, AKH=rp00127en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.engstruct.2009.11.017en_HK
dc.identifier.scopuseid_2-s2.0-75749084752en_HK
dc.identifier.hkuros176099en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-75749084752&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume32en_HK
dc.identifier.issue3en_HK
dc.identifier.spage714en_HK
dc.identifier.epage725en_HK
dc.identifier.isiWOS:000275488000010-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridHo, JCM=24831880500en_HK
dc.identifier.scopusauthoridLam, JYK=24831751200en_HK
dc.identifier.scopusauthoridKwan, AKH=7101738204en_HK
dc.identifier.citeulike6408203-

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