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Article: Efficient single-step time-dependent analysis of PC structures

TitleEfficient single-step time-dependent analysis of PC structures
Authors
KeywordsMathematical modelling
Cables & tendons
Concrete structures
Issue Date2012
PublisherThomas Telford (ICE Publishing). The Journal's web site is located at http://www.icevirtuallibrary.com/content/serial/eacm
Citation
Proceedings of the Institution of Civil Engineers: Engineering and Computational Mechanics, 2012, v. 165 n. 2, p. 89-102 How to Cite?
AbstractThis paper describes an efficient single-step method to predict the time-dependent behaviour of prestressed concrete (PC) structures due to concrete creep, concrete shrinkage and cable relaxation. A versatile tendon sub-element is first developed to model prestressing cables of arbitrary profiles. To enable accurate estimation of losses of cable forces, a new relaxation model is formulated based on the equivalent creep coefficient, which is verified to work not only in the case of intrinsic relaxation but also under various boundary conditions. An efficient single-step finite-element method is then devised for time-dependent analysis of PC structures considering creep, shrinkage and relaxation based on the age-adjusted elasticity modulus, shrinkage-adjusted elasticity modulus and relaxation-adjusted elasticity modulus respectively. The effects of creep, shrinkage and relaxation on the long-term performance of PC structures are investigated. The numerical results obtained indicate not only the accuracy of the method but also the significance of considering the interaction among various time-varying factors.
Persistent Identifierhttp://hdl.handle.net/10722/163888
ISSN
2015 SCImago Journal Rankings: 0.194

 

DC FieldValueLanguage
dc.contributor.authorSi, Xen_US
dc.contributor.authorAu, FTKen_US
dc.contributor.authorTsang, NCMen_US
dc.date.accessioned2012-09-20T07:52:46Z-
dc.date.available2012-09-20T07:52:46Z-
dc.date.issued2012en_US
dc.identifier.citationProceedings of the Institution of Civil Engineers: Engineering and Computational Mechanics, 2012, v. 165 n. 2, p. 89-102en_US
dc.identifier.issn1755-0777-
dc.identifier.urihttp://hdl.handle.net/10722/163888-
dc.description.abstractThis paper describes an efficient single-step method to predict the time-dependent behaviour of prestressed concrete (PC) structures due to concrete creep, concrete shrinkage and cable relaxation. A versatile tendon sub-element is first developed to model prestressing cables of arbitrary profiles. To enable accurate estimation of losses of cable forces, a new relaxation model is formulated based on the equivalent creep coefficient, which is verified to work not only in the case of intrinsic relaxation but also under various boundary conditions. An efficient single-step finite-element method is then devised for time-dependent analysis of PC structures considering creep, shrinkage and relaxation based on the age-adjusted elasticity modulus, shrinkage-adjusted elasticity modulus and relaxation-adjusted elasticity modulus respectively. The effects of creep, shrinkage and relaxation on the long-term performance of PC structures are investigated. The numerical results obtained indicate not only the accuracy of the method but also the significance of considering the interaction among various time-varying factors.-
dc.languageengen_US
dc.publisherThomas Telford (ICE Publishing). The Journal's web site is located at http://www.icevirtuallibrary.com/content/serial/eacmen_US
dc.relation.ispartofProceedings of the Institution of Civil Engineers: Engineering and Computational Mechanicsen_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsPermission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees-
dc.subjectMathematical modelling-
dc.subjectCables & tendons-
dc.subjectConcrete structures-
dc.titleEfficient single-step time-dependent analysis of PC structuresen_US
dc.typeArticleen_US
dc.identifier.emailAu, FTK: francis.au@hku.hken_US
dc.identifier.authorityAu, FTK=rp00083en_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1680/eacm.10.00030-
dc.identifier.hkuros209130en_US
dc.identifier.volume165en_US
dc.identifier.issue2en_US
dc.identifier.spage89en_US
dc.identifier.epage102en_US
dc.publisher.placeUnited Kingdom-

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