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Article: Ultimate stress in external tendons: Comments on the existing typical methods

TitleUltimate stress in external tendons: Comments on the existing typical methods
Authors
KeywordsBeams
Concrete
External tendons
Prestress
Ultimate stress
Issue Date2010
PublisherQinghua Daxue, Tumu Shuili Gongcheng Xueyuan, Tumu Xi. The Journal's web site is located at http://gclx.periodicals.net.cn/
Citation
Gongcheng Lixue/Engineering Mechanics, 2010, v. 27 n. 9, p. 63-68 How to Cite?
AbstractThree methods for the determination of the ultimate stress in external tendons are introduced and commented. They are bonded reduction methods, regression formulas related to reinforcement index and deformation-based methods. It is shown that deformation-based methods can reflect the characteristic of the coupling between the flexural strength and the entire deformation in prestressed concrete members with external tendons. In the deformation-based methods, two commonly adopted models for computing the length of equivalent plastic region are critically investigated. It is found the model based on the span-depth ratio together with loading type places much emphasis on the effects of loading type on the ultimate stress increment in external tendons. In addition, for the ultimate limit state of a highway bridge with moving traffic loads, it is difficult for designers to judge the coefficient which is related to the load type and load arrangement. In contrast, the key parameter in the model based on the neutral axis depth for computing the length of equivalent plastic region, is stable and consistent and can be treated as a constant. The present study can contribute to establishing a simple formula for the estimation of the ultimate stress in external tendons.
Persistent Identifierhttp://hdl.handle.net/10722/139051
ISSN
2015 SCImago Journal Rankings: 0.487
References

 

DC FieldValueLanguage
dc.contributor.authorDu, JSen_HK
dc.contributor.authorAu, F TKen_HK
dc.date.accessioned2011-09-23T05:44:36Z-
dc.date.available2011-09-23T05:44:36Z-
dc.date.issued2010en_HK
dc.identifier.citationGongcheng Lixue/Engineering Mechanics, 2010, v. 27 n. 9, p. 63-68en_HK
dc.identifier.issn1000-4750en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139051-
dc.description.abstractThree methods for the determination of the ultimate stress in external tendons are introduced and commented. They are bonded reduction methods, regression formulas related to reinforcement index and deformation-based methods. It is shown that deformation-based methods can reflect the characteristic of the coupling between the flexural strength and the entire deformation in prestressed concrete members with external tendons. In the deformation-based methods, two commonly adopted models for computing the length of equivalent plastic region are critically investigated. It is found the model based on the span-depth ratio together with loading type places much emphasis on the effects of loading type on the ultimate stress increment in external tendons. In addition, for the ultimate limit state of a highway bridge with moving traffic loads, it is difficult for designers to judge the coefficient which is related to the load type and load arrangement. In contrast, the key parameter in the model based on the neutral axis depth for computing the length of equivalent plastic region, is stable and consistent and can be treated as a constant. The present study can contribute to establishing a simple formula for the estimation of the ultimate stress in external tendons.en_HK
dc.languagechien_US
dc.publisherQinghua Daxue, Tumu Shuili Gongcheng Xueyuan, Tumu Xi. The Journal's web site is located at http://gclx.periodicals.net.cn/en_HK
dc.relation.ispartofGongcheng Lixue/Engineering Mechanicsen_HK
dc.subjectBeamsen_HK
dc.subjectConcreteen_HK
dc.subjectExternal tendonsen_HK
dc.subjectPrestressen_HK
dc.subjectUltimate stressen_HK
dc.titleUltimate stress in external tendons: Comments on the existing typical methodsen_HK
dc.typeArticleen_HK
dc.identifier.emailAu, F TK:francis.au@hku.hken_HK
dc.identifier.authorityAu, F TK=rp00083en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-77957812121en_HK
dc.identifier.hkuros193134en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77957812121&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume27en_HK
dc.identifier.issue9en_HK
dc.identifier.spage63en_HK
dc.identifier.epage68en_HK
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridDu, JS=36442226500en_HK
dc.identifier.scopusauthoridAu, F TK=7005204072en_HK

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