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Article: Experimental testing and analytical modelling of CFRP-confined large circular RC columns subjected to cyclic axial compression

TitleExperimental testing and analytical modelling of CFRP-confined large circular RC columns subjected to cyclic axial compression
Authors
KeywordsAnalytical modeling
Axial response
Circular rc column
Composite wraps
Concrete column
Issue Date2012
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/engstruct
Citation
Engineering Structures, 2012, v. 40, p. 64-74 How to Cite?
AbstractA physically informed analytical model which describes the cyclic axial stress-strain behavior of reinforced concrete (RC) columns confined with fiber-reinforced polymer (FRP) composite wraps is necessary for the non-linear analysis and seismic design of such columns. Although extensive studies have been conducted on the monotonic axial behavior of small sized FRP-confined unreinforced concrete columns, there is a lack of research on FRP-confined RC columns and also their cyclic axial response. As a consequence, there is a lack of cyclic axial stress-strain models which can enable seismic response to be reliably simulated by numerical means. Due to such knowledge gaps, this study reports the results of thirty CFRP-confined large-scale unreinforced and RC circular columns subjected to monotonic and cyclic axial compression loading. The test results indicate that the overall shape of the stress-strain curves, the peak compressive stress and strain at failure, the unloading/reloading paths, and also the plastic strain of CFRP-confined concrete are influenced by the CFRP wrap and internal hoop steel reinforcement. On the basis of the experimental results, a cyclic stress-strain model for CFRP-confined circular RC columns is then proposed. The proposed model consists of three main components, namely (i) a monotonically ascending portion to describe the envelope curve, (ii) a polynomial equation to describe unloading paths, and (iii) a straight line to describe reloading paths. The influence of internal hoop reinforcement on the monotonic model, as well as the unloading and reloading responses is also considered. The accuracy of the proposed model is validated with the test data reported in this paper as well as other test results of relevance extracted from the open literature. © 2012.
Persistent Identifierhttp://hdl.handle.net/10722/163908
ISSN
2015 Impact Factor: 1.893
2015 SCImago Journal Rankings: 1.813
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, Zen_US
dc.contributor.authorWang, Den_US
dc.contributor.authorSmith, STen_US
dc.contributor.authorLu, Den_US
dc.date.accessioned2012-09-20T07:52:50Z-
dc.date.available2012-09-20T07:52:50Z-
dc.date.issued2012en_US
dc.identifier.citationEngineering Structures, 2012, v. 40, p. 64-74en_US
dc.identifier.issn0141-0296-
dc.identifier.urihttp://hdl.handle.net/10722/163908-
dc.description.abstractA physically informed analytical model which describes the cyclic axial stress-strain behavior of reinforced concrete (RC) columns confined with fiber-reinforced polymer (FRP) composite wraps is necessary for the non-linear analysis and seismic design of such columns. Although extensive studies have been conducted on the monotonic axial behavior of small sized FRP-confined unreinforced concrete columns, there is a lack of research on FRP-confined RC columns and also their cyclic axial response. As a consequence, there is a lack of cyclic axial stress-strain models which can enable seismic response to be reliably simulated by numerical means. Due to such knowledge gaps, this study reports the results of thirty CFRP-confined large-scale unreinforced and RC circular columns subjected to monotonic and cyclic axial compression loading. The test results indicate that the overall shape of the stress-strain curves, the peak compressive stress and strain at failure, the unloading/reloading paths, and also the plastic strain of CFRP-confined concrete are influenced by the CFRP wrap and internal hoop steel reinforcement. On the basis of the experimental results, a cyclic stress-strain model for CFRP-confined circular RC columns is then proposed. The proposed model consists of three main components, namely (i) a monotonically ascending portion to describe the envelope curve, (ii) a polynomial equation to describe unloading paths, and (iii) a straight line to describe reloading paths. The influence of internal hoop reinforcement on the monotonic model, as well as the unloading and reloading responses is also considered. The accuracy of the proposed model is validated with the test data reported in this paper as well as other test results of relevance extracted from the open literature. © 2012.-
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/engstructen_US
dc.relation.ispartofEngineering Structuresen_US
dc.subjectAnalytical modeling-
dc.subjectAxial response-
dc.subjectCircular rc column-
dc.subjectComposite wraps-
dc.subjectConcrete column-
dc.titleExperimental testing and analytical modelling of CFRP-confined large circular RC columns subjected to cyclic axial compressionen_US
dc.typeArticleen_US
dc.identifier.emailSmith, ST: stsmith@hku.hken_US
dc.identifier.authoritySmith, ST=rp00168en_US
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.engstruct.2012.01.004-
dc.identifier.scopuseid_2-s2.0-84862808309-
dc.identifier.hkuros210135en_US
dc.identifier.volume40en_US
dc.identifier.spage64en_US
dc.identifier.epage74en_US
dc.identifier.eissn1873-7323-
dc.identifier.isiWOS:000305592400006-
dc.publisher.placeUnited Kingdom-
dc.identifier.citeulike10492730-

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