GROUND MOTION STUDIES NEAR THE DAM SITE

The power spectrum density and coherence function on the ground motions have been reported by many authors aiming at the construction of the large future electron-positron linear colliders and next generation accelerators. The transfer function of the ground motion, however, is not exactly clear by these present data. We are developing the study to obtain the transfer function using the distinct ground motion source. In the beginning, our studies started in the granite tunnel which is near the dam site, since the wide frequency band source of the ground motion is available and the geological character is simple.