Effect of Irregular Dynamic Impulse History on Liquefaction Characteristics of Saturated Sand

In this paper the experimental results of saturated sand under irregular dynamic impulse history are presented. Experiments are conducted on the pneumato dynamic apparatus. On the basis of testing data developing characteristics of deformation and pore water presure and six kinds of order effects of different impulse are analysed. Finally, the simplified methods suggested by B. H. Seed and Ishihara are checked and discussed.