Abstract
Since Hyogo-Ken Nanbu earthquake in 1995, seismic retrofit of existing expressway RC piers has been carried out. In general, RC jacket method, steel jacket method and continuous fiber sheets jacket method have been applied to the seismic retrofit of RC piers. We have developed a new seismic reinforcing method using a continuous fiber rope, which is expected as a simple and economical method. This paper describes the proposed empirical formula of ductility capacity derived from the results of conducted experiment of RC columns on which the seismic retrofitting method with a continuous fiber rope is applied.