CHARACTERIZATION AND MODELING OF DEBONDING IN RC BEAMS STRENGTHENED WITH FRP COMPOSITES

Abstract eng:
Use of fiber reinforced plastic (FRP) composites for strengthening reinforced concrete (RC) beams have become a frequently used method in the last decade. However, the method is yet to become a mainstream application due to a number of economical and design related issues. From structural mechanics point of view, an important concern regarding the effectiveness and safety of this method is the potential of brittle debonding failures. Such failures, unless adequately considered in the design process, may significantly decrease the effectiveness of the strengthening and may even make the member less safe due to decreased ductility. Despite considerable research progress, continued research in this area is needed to develop the necessary analysis and design procedures and related codes and standards. This paper summarizes the findings of a comprehensive experimental and preliminary analytical research work aimed at modeling debonding failures in FRP strengthened RC beams.

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