Experimental and analytical study of corroded RC beams repaired with externally bonded CFRP shear and flexural reinforcement.

摘要

This study experimentally demonstrates the structural feasibility of using externally bonded carbon fiber-reinforced polymer (CFRP) to repair shear-critical corroded reinforced concrete (RC) beams, and also proposes a model for flexural analysis.;Triantafillou proposed that a CFRP shear strap would fail at an effective strain as a function of its axial rigidity. Bonacci and Maalej observed that the efficiency of CFRP would be drastically reduced upon tension-rebar yielding for RC beams flexurally bonded with the CFRP. Using Triantafillou's technique, they empirically related the efficiency of bonded CFRP to a relative axial rigidity between the CFRP and the tension rebars.;A procedure is presented for estimating the flexural capacity of corroded RC beams using corroded steel areas computed based on Faraday's law and empirical observations. The flexural capacity of non-corroded and corroded RC beams bonded with CFRP is estimated by incorporating Bonacci and Maalej's empirical efficiency data of bonded CFRP.