Abstract
Shaking table tests and the three dimensional distinct element analyses were carried out to investigate the rotation response of tomb stones, which are excited by seismic motion. It is clarified that rotation response of a rigid body is caused by two reasons, one is the rocking caused by one directional input motion and the other is caused by the rotation of particle motion of input motion. The rotation response of a real tomb stone was simulated using the accerelation record observed during 1994 Sanriku-Haruka-Oki Earthquake. It is concluded that, except for special cases, the direction of rotation of a rigid body represents the reverse rotation direction of particle motion of seismic motion.
