Long-term bond stresses and debonding failure of FRP-strengthened RC cracked members |
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| Affiliation: | 1. Departament de Matemàtiques, Universitat Autònoma de Barcelona, Edifici C, 08193 Bellaterra, Barcelona, Catalonia, Spain;2. Departament de Matemàtica Aplicada I, Universitat Politècnica de Catalunya, (EPSEB), Av. Doctor Marañón, 44–50, 08028 Barcelona, Spain;1. Department of Physics, Universitat de les Illes Balears, Ctra. Valldemossa km 7.5, 07014 Palma, Balearic Islands, Spain;2. Department of Physics, Universitat de les Illes Balears, Spain;3. Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya, Spain;1. Department of Geotechnical Engineering and Geo-Sciences (ETCG), Universitat Politècnica de Catalunya, Dr. Marañon 44-50, 08028 Barcelona, Spain;2. Universitat Rovira i Virgili, ETSA Reus, Campus Bellissens, C/Universitat 1, 43204 Reus, Spain;3. ICAC, Institut Català d′Arqueologia Clàssica, Institut Català d′Arqueologia Clàssica, Pl. D′en Rovellat s/n, Tarragona 43003, Spain;1. Department of Radiation Oncology, University of California, San Francisco, San Francisco, CA;2. Division of Plastic and Reconstructive Surgery, University of California, San Francisco, San Francisco, CA;3. Department of Surgery, Carol Frank Buck Breast Care Center, University of California, San Francisco, San Francisco, CA;4. Department of Preventive and Restorative Dental Sciences, Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA |
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| Abstract: | Most of the existing models to prevent debonding failure in beams externally strengthened by fiber reinforced polymer (FRP) laminates were developed focusing on the short term response. This paper studies the effect of concrete creep on the interfacial shear stresses and consequently, on the debonding failure load. A simplified formulation for the instantaneous and time-dependent bond stresses under sustained load is provided. Its reliability is analysed through the results obtained by a non-linear time-dependent analysis model. Previously, this model has been checked to evaluate the long-term response of existing experimental programmes in terms of deflections and strains. |
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| Keywords: | A Laminates B Creep B Debonding B Stress transfer C Analytical modelling |
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