State-of-the-art of advanced FRP applications in civil infrastructure at Ibaraki University

This paper addresses advanced applications of fiber reinforced polymer (FRP) materials in civil infrastructure at Ibaraki University. The overview of development and applications of FRP materials was described in aspects of FRP reinforcement for concrete structures and FRP sheet/plate for repairing and strengthening. We aimed to introduce the innovation and new efforts for developing FRP strengthening techniques, which included new FRP prestressing technique, hybrid FRP technique, and underwater strengthening method. Also, we discussed updates on recent works that focus on the JSCE approach against IC debonding in FRP sheet flexural strengthened RC members and the latest effort for long-term behaviors of FRP externally strengthened structures. As a result, a new idea on strengthening design with FRP composites is suggested based on the concept of performance-based design of structures with the performances of durability, damage controllability and recoverability.