Article: Ductility analysis of prestressed concrete beams with unbonded tendons

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TitleDuctility analysis of prestressed concrete beams with unbonded tendons
AuthorsDu, JS2
Au, FTK1
Cheung, YK1
Kwan, AKH1
KeywordsDuctility
Post-tensioning
Prestressed concrete
Unbonded tendons
Issue Date2008
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/engstruct
CitationEngineering Structures, 2008, v. 30 n. 1, p. 13-21 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.engstruct.2007.02.015
AbstractThis paper describes a numerical method for the full-range analysis of prestressed concrete flexural members with unbonded tendons, taking into account the stress-path dependence of materials. The numerical results compare favourably with experimental results. Parametric studies are carried out to evaluate the influence of loading type, span-depth ratio, combined reinforcement index (CRI), partial prestressing ratio, concrete compressive strength, and ratio of compressive reinforcement, etc. on the ductility behaviour. The results indicate that the curvature ductility factor of prestressed concrete members with unbonded tendons decreases with the increase of CRI. The curvature ductility factors for members with bonded and unbonded tendons for given values of CRI are also analyzed and compared. It is generally observed that when the CRI is between 0.15 and 0.20, the ductility factor of an unbonded member is close to that of the bonded one. Above this range of CRI the ductility factor of an unbonded member is higher than that of a bonded one, while below this range the ductility factor of an unbonded member is lower than that of a bonded one. © 2007 Elsevier Ltd. All rights reserved.
ISSN0141-0296
2011 Impact Factor: 1.351
2011 SCImago Journal Rankings: 0.061
DOIhttp://dx.doi.org/10.1016/j.engstruct.2007.02.015
ISI Accession Number IDWOS:000252832500002
ReferencesReferences in Scopus
DC Field
Value
dc.contributor.authorDu, JS
dc.contributor.authorAu, FTK
dc.contributor.authorCheung, YK
dc.contributor.authorKwan, AKH
dc.date.accessioned2010-09-06T06:32:39Z
dc.date.available2010-09-06T06:32:39Z
dc.date.issued2008
dc.description.abstractThis paper describes a numerical method for the full-range analysis of prestressed concrete flexural members with unbonded tendons, taking into account the stress-path dependence of materials. The numerical results compare favourably with experimental results. Parametric studies are carried out to evaluate the influence of loading type, span-depth ratio, combined reinforcement index (CRI), partial prestressing ratio, concrete compressive strength, and ratio of compressive reinforcement, etc. on the ductility behaviour. The results indicate that the curvature ductility factor of prestressed concrete members with unbonded tendons decreases with the increase of CRI. The curvature ductility factors for members with bonded and unbonded tendons for given values of CRI are also analyzed and compared. It is generally observed that when the CRI is between 0.15 and 0.20, the ductility factor of an unbonded member is close to that of the bonded one. Above this range of CRI the ductility factor of an unbonded member is higher than that of a bonded one, while below this range the ductility factor of an unbonded member is lower than that of a bonded one. © 2007 Elsevier Ltd. All rights reserved.
dc.description.natureLink_to_subscribed_fulltext
dc.identifier.citationEngineering Structures, 2008, v. 30 n. 1, p. 13-21 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.engstruct.2007.02.015
dc.identifier.doihttp://dx.doi.org/10.1016/j.engstruct.2007.02.015
dc.identifier.epage21
dc.identifier.hkuros140396
dc.identifier.isiWOS:000252832500002
dc.identifier.issn0141-0296
2011 Impact Factor: 1.351
2011 SCImago Journal Rankings: 0.061
dc.identifier.issue1
dc.identifier.openurl
dc.identifier.scopuseid_2-s2.0-36549036150
dc.identifier.spage13
dc.identifier.urihttp://hdl.handle.net/10722/71510
dc.identifier.volume30
dc.languageeng
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/engstruct
dc.publisher.placeUnited Kingdom
dc.relation.ispartofEngineering Structures
dc.relation.referencesReferences in Scopus
dc.subjectDuctility
dc.subjectPost-tensioning
dc.subjectPrestressed concrete
dc.subjectUnbonded tendons
dc.titleDuctility analysis of prestressed concrete beams with unbonded tendons
dc.typeArticle
Author Affiliations
  1. The University of Hong Kong
  2. Beijing Jiaotong Daxue