Abstract
In this study, bond stress behavior of corroded reinforced concrete was investigated by carrying out pull-out tests for RC specimens with different corrosion crack widths. Moreover, restraint stress of concrete was evaluated by expansion simulation using non-explosive demolition agent, and a restraint stress model equation for reinforced concrete with corrosion cracking was proposed. Bond strength was observed to decrease linearly as the restraint stress in the concrete decreases, and the degree of decreases was found to be almost the same regardless of the longitudinal corrosion crack widths at the concrete surface, the cover thickness and the diameter of the reinforcement.
Furthermore, using the relationship between the bond strength and restraint stress in concrete, a bond strength model equation and bond-slip relationship model equation were proposed. The predicted values showed generally good agreement with the experimental results of other researchers.
