Experimental study of bond-slip of GFRP bars in concrete under sustained loads
dc.contributor.author
dc.date.accessioned
2016-01-26T07:09:49Z
dc.date.available
2016-01-26T07:09:49Z
dc.date.issued
2015-06-01
dc.identifier.issn
1359-8368
dc.identifier.uri
dc.description.abstract
The structural behaviour of reinforced concrete (RC) elements depends heavily on the bond performance between the concrete and the reinforcing material. Bond behaviour under short-term testing has been extensively analysed for steel reinforcement and many studies have been carried out for fibre reinforced polymer (FRP) reinforcement. However, there has only been limited investigation of the long-term effects of this interaction. Several factors can affect the long-term bond behaviour of these elements, the most important being bond length and the immediate and time-dependent properties of reinforcement and concrete (concrete grade, creep, shrinkage and stiffness). This time-dependent behaviour is likely to cause changes and redistributions in bond stresses not properly considered in the limited existing literature. In this experimental study, the bond performance of GFRP RC under sustained load is investigated through pull-out tests. A total of 12 pull-out specimens were tested for a period of between 90 and 130 days. Two concrete strengths (35 MPa and 50 MPa), two bond lengths (5 and 10 times the diameter of the reinforcing bar) and two reinforcing materials (glass fibre reinforced polymer (GFRP) and steel) were used. Experimental results regarding immediate and time-dependent slip are presented and analysed here. In addition, some specimens were instrumented, with internal strain gauges in the reinforcing bar to provide data on the reinforcement strain, thus allowing the distribution of bond stresses and their evolution during sustained loading to be also presented and analysed
dc.description.sponsorship
he authors acknowledge the support provided by the Spanish Government (Ministerio de Ciencia y Innovacion), Project BIA2010-20234-C03-02, and also the support of Schok Bauteile GmbH for the supply of GFRP bars
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
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/
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Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.compositesb.2015.01.006
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© Composites. Part B, Engineering, 2015, vol. 74, p. 42-52
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Articles publicats (D-EMCI)
dc.rights
Tots els drets reservats
dc.subject
dc.title
Experimental study of bond-slip of GFRP bars in concrete under sustained loads
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
022784
dc.contributor.funder
dc.relation.ProjectAcronym