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Article: Inelastic design of high-axially loaded concrete columns in moderate seismicity regions

TitleInelastic design of high-axially loaded concrete columns in moderate seismicity regions
Authors
KeywordsAxial load
Columns
Confinement
Flexural strength
High-strength concrete
Limited ductility
Reinforced concrete
Issue Date2011
PublisherTechno-Press. The Journal's web site is located at http://technopress.kaist.ac.kr/?journal=sem&subpage=5
Citation
Structural Engineering And Mechanics, 2011, v. 39 n. 4, p. 559-578 How to Cite?
AbstractIn regions of high seismic risk, high-strength concrete (HSC) columns of tall buildings are designed to be fully ductile during earthquake attack by providing substantial amount of confining steel within the critical region. However, in areas of low to moderate seismic risk, the same provision of confining steel is too conservative because of the reduced seismic demand. More critically, it causes problematic steel congestion in the beam-column joints and column critical region. This will eventually affect the quality of concrete placing owing to blockage. To relieve the problem, the confining steel in the critical region of HSC columns located in low to moderate seismicity regions can be suitably reduced, while maintaining a limited ductility level. Despite the advantage, there are still no guidelines developed for designing limited ductility HSC columns. In this paper, a formula for designing limited ductility HSC columns is presented. The validity of the formula was verified by testing half-scale HSC columns subjected to combined high-axial load and flexure, in which the confining steel was provided as per the proposed formula. From the test results, it is evident that the curvature ductility factors obtained for all these columns were about 10, which is the generally accepted level of limited ductility.
Persistent Identifierhttp://hdl.handle.net/10722/137253
ISSN
2015 Impact Factor: 1.021
2015 SCImago Journal Rankings: 0.450
References

 

DC FieldValueLanguage
dc.contributor.authorHo, JCMen_HK
dc.date.accessioned2011-08-26T14:21:48Z-
dc.date.available2011-08-26T14:21:48Z-
dc.date.issued2011en_HK
dc.identifier.citationStructural Engineering And Mechanics, 2011, v. 39 n. 4, p. 559-578en_HK
dc.identifier.issn1225-4568en_HK
dc.identifier.urihttp://hdl.handle.net/10722/137253-
dc.description.abstractIn regions of high seismic risk, high-strength concrete (HSC) columns of tall buildings are designed to be fully ductile during earthquake attack by providing substantial amount of confining steel within the critical region. However, in areas of low to moderate seismic risk, the same provision of confining steel is too conservative because of the reduced seismic demand. More critically, it causes problematic steel congestion in the beam-column joints and column critical region. This will eventually affect the quality of concrete placing owing to blockage. To relieve the problem, the confining steel in the critical region of HSC columns located in low to moderate seismicity regions can be suitably reduced, while maintaining a limited ductility level. Despite the advantage, there are still no guidelines developed for designing limited ductility HSC columns. In this paper, a formula for designing limited ductility HSC columns is presented. The validity of the formula was verified by testing half-scale HSC columns subjected to combined high-axial load and flexure, in which the confining steel was provided as per the proposed formula. From the test results, it is evident that the curvature ductility factors obtained for all these columns were about 10, which is the generally accepted level of limited ductility.en_HK
dc.languageengen_US
dc.publisherTechno-Press. The Journal's web site is located at http://technopress.kaist.ac.kr/?journal=sem&subpage=5en_HK
dc.relation.ispartofStructural Engineering and Mechanicsen_HK
dc.subjectAxial loaden_HK
dc.subjectColumnsen_HK
dc.subjectConfinementen_HK
dc.subjectFlexural strengthen_HK
dc.subjectHigh-strength concreteen_HK
dc.subjectLimited ductilityen_HK
dc.subjectReinforced concreteen_HK
dc.titleInelastic design of high-axially loaded concrete columns in moderate seismicity regionsen_HK
dc.typeArticleen_HK
dc.identifier.emailHo, JCM:johnny.ho@hku.hken_HK
dc.identifier.authorityHo, JCM=rp00070en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-79961056457en_HK
dc.identifier.hkuros191308en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79961056457&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume39en_HK
dc.identifier.issue4en_HK
dc.identifier.spage559en_HK
dc.identifier.epage578en_HK
dc.publisher.placeKorea, Republic ofen_HK
dc.identifier.scopusauthoridHo, JCM=24831880500en_HK

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