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Article: Minimum flexural ductility design of high-strength concrete columns

TitleMinimum flexural ductility design of high-strength concrete columns
Authors
KeywordsAxial Load
Columns
Confinement
Ductility
High-Strength Concrete
Issue Date2009
PublisherHong Kong Institution of Engineers. The Journal's web site is located at http://www.hkie.org.hk/html/publications/transactions/index.asp
Citation
Transactions, 2009, v. 16 n. 4, p. 1-8 How to Cite?
AbstractHigh-strength concrete (HSC) has been widely used in the column construction of tall buildings because of its larger stiffness and strength-to-weight ratio. The current design of HSC columns emphasises the strength design but pays little attention to the ductility design. From structural safety point of view, however, it is important to provide a minimum level of ductility to all structures even they are not subjected to earthquake attack. Currently, this minimum level of ductility in concrete columns is provided by imposing empirical deemed-to-satisfy rules, which limit the minimum size and maximum spacing of the confinement. However, these rules, which are concrete strength independent, have the shortcoming that the ductility level provided Is not consistent - generally lower at higher concrete strength or higher axial load level. To overcome such shortcoming, an extensive parametric study based on nonlinear moment-curvature analysis that investigates the combined effects of concrete strength, axial load level, confining pressure and longitudinal steel ratio on the ductility of concrete columns is conducted herein. Based on the results, a new design inequality and chart are developed, which ensures that a consistent level of ductility could be provided to all concrete columns by limiting the maximum axial load level and minimum confinement.
DescriptionAwarded Paper
Persistent Identifierhttp://hdl.handle.net/10722/150519
ISSN
2015 SCImago Journal Rankings: 0.145
References

 

DC FieldValueLanguage
dc.contributor.authorLam, YKen_US
dc.contributor.authorHo, JCMen_US
dc.contributor.authorKwan, AKHen_US
dc.date.accessioned2012-06-26T06:05:23Z-
dc.date.available2012-06-26T06:05:23Z-
dc.date.issued2009en_US
dc.identifier.citationTransactions, 2009, v. 16 n. 4, p. 1-8en_US
dc.identifier.issn1023-697Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/150519-
dc.descriptionAwarded Paper-
dc.description.abstractHigh-strength concrete (HSC) has been widely used in the column construction of tall buildings because of its larger stiffness and strength-to-weight ratio. The current design of HSC columns emphasises the strength design but pays little attention to the ductility design. From structural safety point of view, however, it is important to provide a minimum level of ductility to all structures even they are not subjected to earthquake attack. Currently, this minimum level of ductility in concrete columns is provided by imposing empirical deemed-to-satisfy rules, which limit the minimum size and maximum spacing of the confinement. However, these rules, which are concrete strength independent, have the shortcoming that the ductility level provided Is not consistent - generally lower at higher concrete strength or higher axial load level. To overcome such shortcoming, an extensive parametric study based on nonlinear moment-curvature analysis that investigates the combined effects of concrete strength, axial load level, confining pressure and longitudinal steel ratio on the ductility of concrete columns is conducted herein. Based on the results, a new design inequality and chart are developed, which ensures that a consistent level of ductility could be provided to all concrete columns by limiting the maximum axial load level and minimum confinement.en_US
dc.languageengen_US
dc.publisherHong Kong Institution of Engineers. The Journal's web site is located at http://www.hkie.org.hk/html/publications/transactions/index.aspen_US
dc.relation.ispartofTransactions of the Hong Kong Institution of Engineersen_US
dc.subjectAxial Loaden_US
dc.subjectColumnsen_US
dc.subjectConfinementen_US
dc.subjectDuctilityen_US
dc.subjectHigh-Strength Concreteen_US
dc.titleMinimum flexural ductility design of high-strength concrete columnsen_US
dc.typeArticleen_US
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1023-697X&volume=16&issue=4&spage=1&epage=8&date=2009&atitle=Minimum+flexural+ductility+of+high-strength+concrete+columns-
dc.identifier.emailHo, JCM: johnny.ho@hku.hken_US
dc.identifier.emailKwan, AKH:khkwan@hkucc.hku.hken_US
dc.identifier.authorityJohnny, CMHO=rp00070en_US
dc.identifier.authorityKwan, AKH=rp00127en_US
dc.description.naturelink_to_OA_fulltexten_US
dc.identifier.scopuseid_2-s2.0-77449146422en_US
dc.identifier.hkuros176100-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77449146422&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume16en_US
dc.identifier.issue4en_US
dc.identifier.spage1en_US
dc.identifier.epage8en_US
dc.publisher.placeHong Kongen_US
dc.identifier.scopusauthoridLam, JYK=24831751200en_US
dc.identifier.scopusauthoridJohnny, CMHO=24831880500en_US
dc.identifier.scopusauthoridKwan, AKH=7101738204en_US

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