Influence of the properties of externally bonded CFRP on the shear behavior of concrete/composite adhesive joints |
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| Authors: | E. Ferrier M. Quiertant K. Benzarti P. Hamelin |
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| Affiliation: | 1. Laboratoire LGCIE, Université Claude Bernard, Lyon I, INSA de Lyon 82 Bd Niels Bohr, Domaine Scientifique De La Doua, 69622 Villeurbanne Cedex, France;2. Université Paris-Est, Laboratoire Central des Ponts & Chaussées (LCPC), 58, bd Lefebvre 75732 Paris Cedex 15, France;1. Centre for Infrastructural Monitoring and Protection, School of Civil and Mechanical Engineering, Curtin University, WA, 6102, Australia;2. State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA Army Engineering University, Nanjing, Jiangsu, 210007, China;1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China;2. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China;3. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China;1. Department of Emerging Technologies & Concepts, Airbus Group, Spain;2. Department of Continuum Mechanics and Structural Analysis, University Carlos III of Madrid, Av. de la Universidad, 30, 28911 Leganes, Spain |
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| Abstract: | This paper concerns the strengthening of concrete structures with externally bonded composite reinforcement, and focuses mainly on the influence of the FRP characteristics on the mechanical behavior of the composite to concrete interface. An experimental investigation was conducted, based on the characterization of such bonded assemblies and using a double lap joint shear test. Twelve different series of specimens were studied in order to evaluate the influence of various parameters related to the FRP material (i.e. the use of carbon or aramid and of fiber reinforced systems, the type of manufacturing process, the values of the Young modulus, the thickness of the FRP and the bonded length) as well as several parameters related to the adhesive joint (i.e. the lap joint thickness, the curing conditions and the elastic modulus of the epoxy adhesive). Analyses of the strain and shear stress distributions along the lap joints emphasized significant effects of the FRP properties and epoxy curing conditions on the interfacial strength. In addition, a bond strength model is proposed in the last part of the study. |
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