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Article: Strengthening of one-way spanning RC slabs with cutouts using FRP composites

TitleStrengthening of one-way spanning RC slabs with cutouts using FRP composites
Authors
KeywordsBonding
Cutouts
FRP
Line loads
Openings
Penetrations
Reinforced concrete
Slabs
Strengthening
Issue Date2009
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/conbuildmat
Citation
Construction And Building Materials, 2009, v. 23 n. 4, p. 1578-1590 How to Cite?
AbstractThis paper reports the results of tests on fibre reinforced polymer (FRP) strengthened one-way spanning reinforced concrete (RC) slabs with central cutouts. Four wide slabs with cutouts were tested in addition to two narrow slabs without cutouts. Different positions of applied line loads for the slabs with cutouts resulted in different slab bending action and hence different FRP behaviour for the strengthened slabs. All FRP-strengthened slabs achieved a higher load-carrying capacity than their unstrengthened control counterparts. In addition, all strengthened slabs failed by debonding initiating at intermediate cracks (IC debonding) and in the case of the slabs with cutouts, the critical cracks were diagonal and originated from the corners of the cutout. The ability of the FRP to redistribute stresses around the cutout, the failure mechanisms, as well as pre- and post-debonding behaviour of the strengthened slabs was therefore assessed for different load application positions. Strains on the FRP, concrete and internal steel reinforcement, as well as deflections at different positions on the slab surfaces are also reported. An analytical model, which is based on the ultimate moment of resistance about critical crack lines, is also reported and it its predictions are found to correlate well with the experimental results. The analytical model is able to capture the different slab bending actions in addition to the debonding failure of the strengthened slabs. © 2008 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/58496
ISSN
2015 Impact Factor: 2.421
2015 SCImago Journal Rankings: 1.606
ISI Accession Number ID
Funding AgencyGrant Number
University of Technology Sydney (UTS), through a Research Excellence Grant
Funding Information:

The support of the University of Technology Sydney (UTS), through a Research Excellence Grant awarded to the first author of this paper while he was employed by UTS, is gratefully acknowledged. The authors wish to thank Degussa (Aust) Pty Ltd and also Dr. Ameli and Messrs Shrestha, Kaul, Otoom and Vo for assisting with the experiments.

References

 

DC FieldValueLanguage
dc.contributor.authorSmith, STen_HK
dc.contributor.authorKim, SJen_HK
dc.date.accessioned2010-05-31T03:31:27Z-
dc.date.available2010-05-31T03:31:27Z-
dc.date.issued2009en_HK
dc.identifier.citationConstruction And Building Materials, 2009, v. 23 n. 4, p. 1578-1590en_HK
dc.identifier.issn0950-0618en_HK
dc.identifier.urihttp://hdl.handle.net/10722/58496-
dc.description.abstractThis paper reports the results of tests on fibre reinforced polymer (FRP) strengthened one-way spanning reinforced concrete (RC) slabs with central cutouts. Four wide slabs with cutouts were tested in addition to two narrow slabs without cutouts. Different positions of applied line loads for the slabs with cutouts resulted in different slab bending action and hence different FRP behaviour for the strengthened slabs. All FRP-strengthened slabs achieved a higher load-carrying capacity than their unstrengthened control counterparts. In addition, all strengthened slabs failed by debonding initiating at intermediate cracks (IC debonding) and in the case of the slabs with cutouts, the critical cracks were diagonal and originated from the corners of the cutout. The ability of the FRP to redistribute stresses around the cutout, the failure mechanisms, as well as pre- and post-debonding behaviour of the strengthened slabs was therefore assessed for different load application positions. Strains on the FRP, concrete and internal steel reinforcement, as well as deflections at different positions on the slab surfaces are also reported. An analytical model, which is based on the ultimate moment of resistance about critical crack lines, is also reported and it its predictions are found to correlate well with the experimental results. The analytical model is able to capture the different slab bending actions in addition to the debonding failure of the strengthened slabs. © 2008 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/conbuildmaten_HK
dc.relation.ispartofConstruction and Building Materialsen_HK
dc.rightsConstruction and Building Materials. Copyright © Elsevier BV.en_HK
dc.subjectBondingen_HK
dc.subjectCutoutsen_HK
dc.subjectFRPen_HK
dc.subjectLine loadsen_HK
dc.subjectOpeningsen_HK
dc.subjectPenetrationsen_HK
dc.subjectReinforced concreteen_HK
dc.subjectSlabsen_HK
dc.subjectStrengtheningen_HK
dc.titleStrengthening of one-way spanning RC slabs with cutouts using FRP compositesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0950-0618&volume=23&issue=4&spage=1578&epage=1590&date=2009&atitle=Strengthening+of+one-way+spanning+RC+slabs+with+cutouts+using+FRP+compositesen_HK
dc.identifier.emailSmith, ST:stsmith@hku.hken_HK
dc.identifier.authoritySmith, ST=rp00168en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.conbuildmat.2008.06.005en_HK
dc.identifier.scopuseid_2-s2.0-59049103576en_HK
dc.identifier.hkuros163399en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-59049103576&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume23en_HK
dc.identifier.issue4en_HK
dc.identifier.spage1578en_HK
dc.identifier.epage1590en_HK
dc.identifier.isiWOS:000264000000011-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridSmith, ST=8751691000en_HK
dc.identifier.scopusauthoridKim, SJ=24833490500en_HK

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