抄録
It has been known that the ductility of bridge piers can be improved if they are constructed of high ductility cement, but the use of this cement is not so widespread because of cost problems. To find the most efficient use of this material for seismic strengthening of bridge piers, the authors performed a loading test using specimens with varying cover concrete thicknesses. From the experiment, it shows excellent deformation by using spiral reinforcement, and high ductility cement.