Modelling of tension-stiffening in bending RC elements based on equivalent stiffness of the rebar
dc.contributor.author
dc.date.accessioned
2016-04-29T06:36:30Z
dc.date.available
2016-04-29T06:36:30Z
dc.date.issued
2015
dc.identifier.issn
1225-4568
dc.identifier.uri
dc.description.abstract
The contribution of tensioned concrete between cracks (tension-stiffening) cannot be ignored when analysing deformation of reinforced concrete elements. The tension-stiffening effect is crucial when it comes to adequately estimating the load-deformation response of steel reinforced concrete and the more recently appeared fibre reinforced polymer (FRP) reinforced concrete. This paper presents a unified methodology for numerical modelling of the tension-stiffening effect in steel as well as FRP reinforced flexural members using the concept of equivalent deformation modulus and the smeared crack approach to obtain a modified stress-strain relation of the reinforcement. A closed-form solution for the equivalent secant modulus of deformation of the tensioned reinforcement is proposed for rectangular sections taking the Eurocode 2 curvature prediction technique as the reference. Using equations based on general principles of structural mechanics, the main influencing parameters are obtained. It is found that the ratio between the equivalent stiffness and the initial stiffness basically depends on the product of the modular ratio and reinforcement ratio (nρ), the effective-to-total depth ratio (d/h), and the level of loading. The proposed methodology is adequate for numerical modelling of tension-stiffening for different FRP and steel reinforcement, under both service and ultimate conditions. Comparison of the predicted and experimental data obtained by the authors indicates that the proposed methodology is capable to adequately model the tension-stiffening effect in beams reinforced with FRP or steel bars within wide range of loading
dc.description.sponsorship
The authors acknowledge the support provided by the Spanish Government (Ministerio de Ciencia e Innovación), Project ref. BIA2010-20234-C03-02. The authors also gratefully acknowledge the financial support provided by the Research Council of Lithuania (Project No.MIP–083/2012) and the European Social Fund (Project No. VP1-3.1-ŠMM-08-K-01-020). Furthermore, the authors would like to thank COST Action TU 1207 “Next Generation Design Guidelines for Composites in Construction” for facilitating their collaboration
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Techno-Press
dc.relation
info:eu-repo/grantAgreement/MICINN//BIA2010-20234-C03-02/ES/REFUERZO DE ESTRUCTURAS DE HORMIGON CON MATERIALES COMPUESTOS (FRP) INSERTADOS EN EL RECUBRIMIENTO (NSM): ADHERENCIA (PULL-OUT) Y REFUERZO A FLEXION DE VIGAS Y PLACAS/
dc.relation.isformatof
Reproducció digital del document publicat a: http://dx.doi.org/10.12989/sem.2015.53.5.997
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© Structural Engineering and Mechanics, 2015, vol. 53, núm. 5, p. 997-1016
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Articles publicats (D-EMCI)
dc.rights
Tots els drets reservats
dc.subject
dc.title
Modelling of tension-stiffening in bending RC elements based on equivalent stiffness of the rebar
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/embargoedAccess
dc.embargo.terms
Cap
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2026-01-01
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
022987
dc.contributor.funder
dc.relation.ProjectAcronym
dc.identifier.eissn
1598-6217