In this study, experimental research was carried out to improve and evaluate the seismic performance of reinforced exterior concrete beam-column joint strengthened with different anchorage length of embedded CFRP Rods in existing reinforced concrete building. Test result shows that retrofitting specimen(RBCJ-SR2T1, SR2T2) designed by the improvement of seismic performance of reinforced concrete beam-column joints, maximum load-carrying capacities were increased 2.24 ~ 2.24 times in comparison with the standard specimen(RBCJC). Also, retrofitting specimens showed stable hysteretic behavior compared to the standard specimen(RBCJC).

As the weight is increased by the quantity and size of the members in large scale structures, precast column-beam joints should be designed in consideration of the assembly process. This paper was presented a way to reflect the construction difficulty such as interference of rebar at the end of beam when you design rebar joints and calculation of the length of the embedded steel.