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Article: CFRP-confined square RC columns. I: experimental investigation

TitleCFRP-confined square RC columns. I: experimental investigation
Authors
KeywordsConfinement
Fiber reinforced polymer
Reinforced concrete
Concrete columns
Cyclic tests
Issue Date2012
PublisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/cc.html
Citation
Journal of Composites for Construction, 2012, v. 16 n. 2, p. 150-160 How to Cite?
AbstractThe majority of experimental studies investigating the stress-strain behavior of square concrete columns confined with carbon fiber-reinforced polymer (CFRP) composites have focused largely on unreinforced columns of small size. Research on the influence of larger cross section, height, internal steel reinforcement, and initial damage on the axial strength and compressive behavior of CFRP-confined square reinforced concrete (RC) columns is, however, limited. To address such knowledge gaps, this paper presents the results of an experimental investigation on the axial stress-strain behavior of 34 larger-sized square-sectioned RC columns confined with CFRP composite wraps. The primary test variables were (1)cross-sectional dimensions, (2)volumetric ratio of internal hoop steel reinforcement, (3)number of layers of CFRP wrap, (4)nature of loading (i.e.,monotonic and cyclic), and (5)damage level before CFRP wrapping. The experiments showed the CFRP wrap to considerably enhance the axial strain capacity but to only slightly increase the axial stress capacity. The experiments also showed the internal reinforcement to influence the shape of the axial stress-strain envelope curve and unloading path and the ultimate axial strain and plastic strain values. Predamage was, however, found to have a small influence. A new confinement pressure model for fiber-reinforced polymer (FRP) confined square RC columns is finally proposed. © 2012 American Society of Civil Engineers.
Persistent Identifierhttp://hdl.handle.net/10722/139082
ISSN
2015 Impact Factor: 2.503
2015 SCImago Journal Rankings: 2.051
ISI Accession Number ID
Funding AgencyGrant Number
National Natural Science Foundation of China51078109
50408010
Heilongjiang Provincial Foundation for Returned Overseas ScholarsLC2011C23
Structural Engineering and Earthquake Resistance Laboratory at Harbin Institute of Technology
Funding Information:

This research was supported by the National Natural Science Foundation of China (Grant Nos. 51078109 and 50408010) and the Heilongjiang Provincial Foundation for Returned Overseas Scholars (Grant No. LC2011C23). Support provided by the technical staff of the Structural Engineering and Earthquake Resistance Laboratory at Harbin Institute of Technology is greatly appreciated.

 

DC FieldValueLanguage
dc.contributor.authorWang, ZYen_US
dc.contributor.authorWang, DYen_US
dc.contributor.authorSmith, STen_US
dc.contributor.authorLu, DGen_US
dc.date.accessioned2011-09-23T05:44:50Z-
dc.date.available2011-09-23T05:44:50Z-
dc.date.issued2012en_US
dc.identifier.citationJournal of Composites for Construction, 2012, v. 16 n. 2, p. 150-160en_US
dc.identifier.issn1090-0268en_US
dc.identifier.urihttp://hdl.handle.net/10722/139082-
dc.description.abstractThe majority of experimental studies investigating the stress-strain behavior of square concrete columns confined with carbon fiber-reinforced polymer (CFRP) composites have focused largely on unreinforced columns of small size. Research on the influence of larger cross section, height, internal steel reinforcement, and initial damage on the axial strength and compressive behavior of CFRP-confined square reinforced concrete (RC) columns is, however, limited. To address such knowledge gaps, this paper presents the results of an experimental investigation on the axial stress-strain behavior of 34 larger-sized square-sectioned RC columns confined with CFRP composite wraps. The primary test variables were (1)cross-sectional dimensions, (2)volumetric ratio of internal hoop steel reinforcement, (3)number of layers of CFRP wrap, (4)nature of loading (i.e.,monotonic and cyclic), and (5)damage level before CFRP wrapping. The experiments showed the CFRP wrap to considerably enhance the axial strain capacity but to only slightly increase the axial stress capacity. The experiments also showed the internal reinforcement to influence the shape of the axial stress-strain envelope curve and unloading path and the ultimate axial strain and plastic strain values. Predamage was, however, found to have a small influence. A new confinement pressure model for fiber-reinforced polymer (FRP) confined square RC columns is finally proposed. © 2012 American Society of Civil Engineers.-
dc.languageengen_US
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/cc.htmlen_US
dc.relation.ispartofJournal of Composites for Constructionen_US
dc.rightsJournal of Composites for Construction. Copyright © American Society of Civil Engineers.-
dc.subjectConfinement-
dc.subjectFiber reinforced polymer-
dc.subjectReinforced concrete-
dc.subjectConcrete columns-
dc.subjectCyclic tests-
dc.titleCFRP-confined square RC columns. I: experimental investigationen_US
dc.typeArticleen_US
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1090-0268&volume=doi:10.1061/&issue=ASCE&spage=&epage=&date=2011&atitle=CFRP-confined+square+RC+columns.+I:+experimental+investigationen_US
dc.identifier.emailSmith, ST: stsmith@hku.hken_US
dc.identifier.authoritySmith, ST=rp00168en_US
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1061/(ASCE)CC.1943-5614.0000245-
dc.identifier.scopuseid_2-s2.0-84870732799-
dc.identifier.hkuros194998en_US
dc.identifier.hkuros210137-
dc.identifier.volume16-
dc.identifier.issue2en_US
dc.identifier.spage150-
dc.identifier.epage160-
dc.identifier.isiWOS:000303129600004-
dc.publisher.placeUnited States-

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