ABSTRACT

The design earthquake motion is defined in terms of acceleration response spectrum at engineering bedrock in the Building Standard Low of Japan. This wave is called design wave in this paper. Design wave is used to compare with pulsive earthquake ground motion. Acceleration waveform of design wave is indicated in Fig. 1(b) and the acceleration response spectrum of Ricker wave is shown in Fig. 1(c). Here, the time dependence characteristics

1 INTRODUCTION

There are the active vibration control systems which control the displacement response against dynamic excitation such as earthquake motion, strong wind and so on. After 1995 Hyogoken Nanbu earthquake, it is increasing to use hysteretic and viscous dampers in Japan (Kitamura et al, 2003).