抄録
It is pointed out that the input acceleration to a building may be small compared with the acceleration of ground surface in the recent great earthquakes. In this paper, dynamic centrifuge tests using a rigid structure supported by saturated sand deposit were performed to investigate the influence of groundwater level. It was shown that the foundation was adsorbed to the ground by negative excess pore water pressure in case of groundwater level equal to the foundation base. Therefore, there is a possibility that the groundwater level has affected the structure damage during severe earthquakes.
