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Article: Experimental tests on high-strength concrete columns subjected to combined medium axial load and flexure

TitleExperimental tests on high-strength concrete columns subjected to combined medium axial load and flexure
Authors
KeywordsAxial load
Reinforced concrete
Confinement
Flexural strength
High-strength concrete
Columns
Moderate ductility
Issue Date2012
PublisherMulti-Science Publishing Co Ltd. The Journal's web site is located at http://www.multi-science.co.uk/advstruc.htm
Citation
Advances in Structural Engineering, 2012, v. 15 n. 8, p. 1359-1374 How to Cite?
AbstractTo resist large deformability demand due to earthquake attack, high-strength concrete (HSC) columns of tall buildings in high seismicity regions are designed to be fully ductile by providing heavy confining steel in the plastic hinge region. However, in areas of low to moderate seismic risks, where the columns are subjected to reduced seismic demand, the same provision of confining steel causes unwanted increase in construction cost (i.e. less cost effective) and embodied energy or carbon level of the structures (i.e. less environmentally friendly). Especially for ultra-HSC columns, the required confining steel will be too large to be provided in the plastic hinge region, which adversely affects the concrete placing quality. To alleviate the problem, a series of experimental tests on HSC columns that contain less confining steel than that of fully ductile columns in the plastic hinge region was carried out to investigate their performance under medium axial load and flexure. From the obtained test results, it was found that these columns perform better than the HSC columns without sufficient confining steel. Also, the drift of these columns can reach about 3% and the respective curvature ductility factors of about 10.
Persistent Identifierhttp://hdl.handle.net/10722/159433
ISSN
2015 Impact Factor: 0.577
2015 SCImago Journal Rankings: 0.475

 

DC FieldValueLanguage
dc.contributor.authorHo, JCMen_US
dc.date.accessioned2012-08-16T05:49:53Z-
dc.date.available2012-08-16T05:49:53Z-
dc.date.issued2012en_US
dc.identifier.citationAdvances in Structural Engineering, 2012, v. 15 n. 8, p. 1359-1374en_US
dc.identifier.issn1369-4332-
dc.identifier.urihttp://hdl.handle.net/10722/159433-
dc.description.abstractTo resist large deformability demand due to earthquake attack, high-strength concrete (HSC) columns of tall buildings in high seismicity regions are designed to be fully ductile by providing heavy confining steel in the plastic hinge region. However, in areas of low to moderate seismic risks, where the columns are subjected to reduced seismic demand, the same provision of confining steel causes unwanted increase in construction cost (i.e. less cost effective) and embodied energy or carbon level of the structures (i.e. less environmentally friendly). Especially for ultra-HSC columns, the required confining steel will be too large to be provided in the plastic hinge region, which adversely affects the concrete placing quality. To alleviate the problem, a series of experimental tests on HSC columns that contain less confining steel than that of fully ductile columns in the plastic hinge region was carried out to investigate their performance under medium axial load and flexure. From the obtained test results, it was found that these columns perform better than the HSC columns without sufficient confining steel. Also, the drift of these columns can reach about 3% and the respective curvature ductility factors of about 10.-
dc.languageengen_US
dc.publisherMulti-Science Publishing Co Ltd. The Journal's web site is located at http://www.multi-science.co.uk/advstruc.htm-
dc.relation.ispartofAdvances in Structural Engineeringen_US
dc.subjectAxial load-
dc.subjectReinforced concrete-
dc.subjectConfinement-
dc.subjectFlexural strength-
dc.subjectHigh-strength concrete-
dc.subjectColumns-
dc.subjectModerate ductility-
dc.titleExperimental tests on high-strength concrete columns subjected to combined medium axial load and flexureen_US
dc.typeArticleen_US
dc.identifier.emailHo, JCM: johnny.ho@hku.hken_US
dc.identifier.authorityHo, JCM=rp00070en_US
dc.identifier.doi10.1260/1369-4332.15.8.1359-
dc.identifier.hkuros204883en_US
dc.identifier.volume15en_US
dc.identifier.issue8-
dc.identifier.spage1359-
dc.identifier.epage1374-
dc.publisher.placeUnited Kingdom-

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