A Study on the Plastic Deformations of the Sandy Ground under Impulsive Load

The rigid plate under vertical impulse produces homogenous plastic depressions. But we could hardly see such studies. So we carried out some experiments which were held in order to certain the relations between the amount of impulse and the plastic deformations of the rigid plates and tried to enlarge the theoretical method applied to the plastic deformations of steel beams under vertical impulse. At the same time we newly defined the impulsive ground coefficients and examined the relations between the amount of impulse and the impulsive reaction forces of the ground and the impulsive ground coefficients, More details are described in the following articles.