In this study, the buckling load capacity of steel circular pipes with carbon fiber was investigated to repair or strengthen them when they are damaged by corrosion or need reinforcement. In addition, to establish repair and reinforcement methods, a method for evaluating the load-bearing capacity was studied using various design formulas for buckling load-bearing capacity. And then, the optimal range of bonding according to the amount of reinforcement was also verified. As a result, we found that carbon fiber bonding is adequate for both repair measures to restore performance and reinforcement measures to increase the bearing capacity.
