Long-term structural performance of corroded RC beams repaired with externally bonded CFRP reinforcement

This study investigates the long-term structural performance of shear- and flexure-critical reinforced concrete (RC) beams that have been corroded and repaired with externally bonded carbon fibre-reinforced polymer (CFRP) composites. Seven large-scale RC beams were constructed, five of which were subjected to an accelerated corrosion regime. The resulting corrosion damage was repaired in flexure and shear with CFRP. Four beams were subjected to further corrosion after CFRP application to simulate the effects of long-term exposure. Structural testing of the beams shows that the longitudinal CFRP layer is rendered ineffective after further corrosion exposure.; An analytical model is used to predict the flexural response of corroded, CFRP-repaired RC beams. Separate analyses are conducted to account for the deteriorated bond and associated debonding at the CFRP-concrete interface. Khalifa et al.'s model is used to predict the shear capacity of beams strengthened in shear with CFRP.