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Evaluation of bonded FRP strengthening systems for concrete structures using infrared thermography and shearography
This paper presents a method for detection and characterization of the depth and width of defects (delaminations or adhesive disbonds) that can take place at the interface between the concrete substrate and the bonded FRP used for the reinforcement of concrete structures. Detection of disbonds between different layers is also possible. Moreover, this method can be used to evaluate the quality of adhesion of the FRP to the substrate (partial delamination, damage or poor mechanical properties of the resin). This method is based on two complementary techniques: shearography associated to a depressure solicitation on the one hand, and stimulated infrared thermography on the other hand. Theoretical and experimental analyses of adhesive disbonds are first presented. The performance of the method is then demonstrated using data from experimental inspection of specimens containing calibrated defects. In the inspected samples, debonded areas were simulated by locally replacing the epoxy resin with non-adherent polytetrafluoroethylene (PTFE) discs at the concrete-to-FRP interface or between different FRP layers.
Evaluation of bonded FRP strengthening systems for concrete structures using infrared thermography and shearography
This paper presents a method for detection and characterization of the depth and width of defects (delaminations or adhesive disbonds) that can take place at the interface between the concrete substrate and the bonded FRP used for the reinforcement of concrete structures. Detection of disbonds between different layers is also possible. Moreover, this method can be used to evaluate the quality of adhesion of the FRP to the substrate (partial delamination, damage or poor mechanical properties of the resin). This method is based on two complementary techniques: shearography associated to a depressure solicitation on the one hand, and stimulated infrared thermography on the other hand. Theoretical and experimental analyses of adhesive disbonds are first presented. The performance of the method is then demonstrated using data from experimental inspection of specimens containing calibrated defects. In the inspected samples, debonded areas were simulated by locally replacing the epoxy resin with non-adherent polytetrafluoroethylene (PTFE) discs at the concrete-to-FRP interface or between different FRP layers.
Evaluation of bonded FRP strengthening systems for concrete structures using infrared thermography and shearography
Bewertung von geklebten Festigkeitssystemen aus faserverstärkten Kunststoffen für Betonstrukturen mittels Infrarotthermographie und Scherographie
Taillade, Frederic (author) / Quiertant, Marc (author) / Benzarti, Karim (author) / Aubagnac, Christophe (author)
2009
6 Seiten, 7 Bilder, 10 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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