SOME RECENT RESEARCH ON FRP COMPOSITES FOR THE STRENGTHENING OF CONCRETE STRUCTURES UNDER NORMAL AND EXTREME LOADING ACTION

摘要

Strengthening of existing concrete structures using externally bonded fibre reinforced polymer (FRP) has gained wide acceptance nowadays. The main focus of many past studies has been on the short-terM behaviour of concrete structures externally bonded with FRP composites. Recently increasing attention has also been paid to their long-term performance under various environmental actions and extreme loading like fire. This paper presents a summary of some recent research conducted by the author within the context of FRP strengthening. The contents include performance optimization of FRP-to-concrete bond interface, bond mechanisms of near surface mounted (NSM) FRP reinforcement, seismic retrofit of RC columns, durability of FRP-strengthened Rc structures and fire performance of FRP-strengthened RC structures. Much of the above research work is being conducted in collaboration with Prof Jin-Guang Teng, the leader of the research group on "Emerging Structural Materials and Systems (ESMS)" at The Hong Kong Polytechnic University.