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Article: Deformability of concrete beams with unbonded FRP tendons

TitleDeformability of concrete beams with unbonded FRP tendons
Authors
KeywordsDeformability
Ductility
Fibre-reinforced polymer
Prestressed concrete beams
Unbonded tendons
Issue Date2008
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/engstruct
Citation
Engineering Structures, 2008, v. 30 n. 12, p. 3764-3770 How to Cite?
AbstractAs fibre-reinforced polymer (FRP) behaves linearly until it ruptures without any yielding, the ductility and deformability of prestressed concrete beams with FRP tendons are of prime concern. This paper describes a comparative study of five existing deformability indices for unbonded partially prestressed concrete (UPPC) beams with FRP tendons. A numerical method has been developed to predict the full-range response of prestressed concrete beams with bonded and/or unbonded FRP tendons under loading, and the results agree well with experimental results reported in the technical literature. The results show that the deformability index defined as the ratio of the product of moment and deflection at ultimate to the corresponding value at cracking is consistently decreasing with the increase of combined reinforcement ratio. In addition, this index is sensitive to changes of factors that may influence the deformability of UPPC beams with FRP tendons. The present investigation also indicates that, when the ratio of neutral axis depth to the depth to FRP tendons at the critical section at ultimate is greater than 0.3, the beam would fail by crushing of concrete, which is the more favourable failure mode compared to the rupture of tendons. © 2008 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/58570
ISSN
2015 Impact Factor: 1.893
2015 SCImago Journal Rankings: 1.813
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of the Hong Kong Special Administrative Region, ChinaHKU 7101/04E
Funding Information:

The work described in this paper has been supported by the Research Grants Council of the Hong Kong Special Administrative Region, China (RGC Project No. HKU 7101/04E).

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorAu, FTKen_HK
dc.contributor.authorDu, JSen_HK
dc.date.accessioned2010-05-31T03:32:41Z-
dc.date.available2010-05-31T03:32:41Z-
dc.date.issued2008en_HK
dc.identifier.citationEngineering Structures, 2008, v. 30 n. 12, p. 3764-3770en_HK
dc.identifier.issn0141-0296en_HK
dc.identifier.urihttp://hdl.handle.net/10722/58570-
dc.description.abstractAs fibre-reinforced polymer (FRP) behaves linearly until it ruptures without any yielding, the ductility and deformability of prestressed concrete beams with FRP tendons are of prime concern. This paper describes a comparative study of five existing deformability indices for unbonded partially prestressed concrete (UPPC) beams with FRP tendons. A numerical method has been developed to predict the full-range response of prestressed concrete beams with bonded and/or unbonded FRP tendons under loading, and the results agree well with experimental results reported in the technical literature. The results show that the deformability index defined as the ratio of the product of moment and deflection at ultimate to the corresponding value at cracking is consistently decreasing with the increase of combined reinforcement ratio. In addition, this index is sensitive to changes of factors that may influence the deformability of UPPC beams with FRP tendons. The present investigation also indicates that, when the ratio of neutral axis depth to the depth to FRP tendons at the critical section at ultimate is greater than 0.3, the beam would fail by crushing of concrete, which is the more favourable failure mode compared to the rupture of tendons. © 2008 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/engstructen_HK
dc.relation.ispartofEngineering Structuresen_HK
dc.subjectDeformabilityen_HK
dc.subjectDuctilityen_HK
dc.subjectFibre-reinforced polymeren_HK
dc.subjectPrestressed concrete beamsen_HK
dc.subjectUnbonded tendonsen_HK
dc.titleDeformability of concrete beams with unbonded FRP tendonsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0141-0296&volume=30&issue=12&spage=3764&epage=3770&date=2008&atitle=Deformability+of+concrete+beams+with+unbonded+FRP+tendonsen_HK
dc.identifier.emailAu, FTK:francis.au@hku.hken_HK
dc.identifier.authorityAu, FTK=rp00083en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.engstruct.2008.07.003en_HK
dc.identifier.scopuseid_2-s2.0-55949117489en_HK
dc.identifier.hkuros158941en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-55949117489&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume30en_HK
dc.identifier.issue12en_HK
dc.identifier.spage3764en_HK
dc.identifier.epage3770en_HK
dc.identifier.isiWOS:000261678200034-
dc.publisher.placeUnited Kingdomen_HK
dc.relation.projectDuctility and deformability of high-strength concrete beams partially prestressed with conventional and non-conventional unbonded tendons-
dc.identifier.scopusauthoridAu, FTK=7005204072en_HK
dc.identifier.scopusauthoridDu, JS=36442226500en_HK

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