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Article: Efficiency on uni-axial compressive strength improvement by using externally confined concrete-filled steel tube columns

TitleEfficiency on uni-axial compressive strength improvement by using externally confined concrete-filled steel tube columns
Authors
Issue Date2013
PublisherHong Kong Institution of Engineers. The Journal's web site is located at http://www.hkie.org.hk/html/publications/transactions/index.asp
Citation
HKIE Transactions, 2013, v. 20 n. 2, p. 96-108 How to Cite?
AbstractConcrete-filled steel tube (CFST) columns have become one of the most popular structural forms of column construction in tall buildings. It is particularly efficient for columns constructed of high-strength concrete because the steel tube can provide a uniform and continuous confinement that significantly improves the ductility. The CFST columns are therefore characterised by higher strength, ductility and large energy absorption before failure. However, a major problem of CFST columns is the imperfect steel–concrete interface bonding that occurs at the elastic stage, which adversely affects the confining effect and decreases the strength and elastic modulus. To resolve the problem, external steel rings are proposed to restrict the dilation of steel tube under axial compression. The authors have conducted a series of pilot tests on uni-axial compression behaviour of some CFST columns with the proposed external confinements. From the results, it was found that the strength and stiffness can be significantly improved by 10–20%. The authors have also compared the strength of these columns with the reinforced concrete (RC) columns counterparts with the same concrete and steel volume. It is evident that the strength of CFST columns is much higher than the RC columns, which indicates that the use of CFST columns can utilise less construction materials and create a more environmentally friendly construction method.
Persistent Identifierhttp://hdl.handle.net/10722/159436
ISSN
2015 SCImago Journal Rankings: 0.145

 

DC FieldValueLanguage
dc.contributor.authorHo, JCMen_US
dc.contributor.authorLuo, Len_US
dc.date.accessioned2012-08-16T05:49:54Z-
dc.date.available2012-08-16T05:49:54Z-
dc.date.issued2013en_US
dc.identifier.citationHKIE Transactions, 2013, v. 20 n. 2, p. 96-108en_US
dc.identifier.issn1023-697X-
dc.identifier.urihttp://hdl.handle.net/10722/159436-
dc.description.abstractConcrete-filled steel tube (CFST) columns have become one of the most popular structural forms of column construction in tall buildings. It is particularly efficient for columns constructed of high-strength concrete because the steel tube can provide a uniform and continuous confinement that significantly improves the ductility. The CFST columns are therefore characterised by higher strength, ductility and large energy absorption before failure. However, a major problem of CFST columns is the imperfect steel–concrete interface bonding that occurs at the elastic stage, which adversely affects the confining effect and decreases the strength and elastic modulus. To resolve the problem, external steel rings are proposed to restrict the dilation of steel tube under axial compression. The authors have conducted a series of pilot tests on uni-axial compression behaviour of some CFST columns with the proposed external confinements. From the results, it was found that the strength and stiffness can be significantly improved by 10–20%. The authors have also compared the strength of these columns with the reinforced concrete (RC) columns counterparts with the same concrete and steel volume. It is evident that the strength of CFST columns is much higher than the RC columns, which indicates that the use of CFST columns can utilise less construction materials and create a more environmentally friendly construction method.-
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.asp-
dc.relation.ispartofHKIE Transactionsen_US
dc.titleEfficiency on uni-axial compressive strength improvement by using externally confined concrete-filled steel tube columnsen_US
dc.typeArticleen_US
dc.identifier.emailHo, JCM: jcmho1@hkucc.hku.hken_US
dc.identifier.authorityHo, JCM=rp00070en_US
dc.identifier.doi10.1080/1023697X.2013.794572-
dc.identifier.hkuros204890en_US
dc.identifier.volume20en_US
dc.identifier.issue2-
dc.identifier.spage96-
dc.identifier.epage108-
dc.publisher.placeHong Kong-

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