Shaking table tests for single pile-soil dynamic interaction in liquefied foundation soil

Based on shaking table tests,the dynamic responses of a pile-soil-structure were observed under the simulated earthquake.The test results indicated that the soil with different depth is liquefied with continuous increase in excess pore water pressure within the vibration process,and the top soil firstly reaches liquefaction;pile side friction decreases greatly after the soil is liquefied,the most load of the upper structure is born by the harder stratum at the bottom of the pile,the vertical bearing capacity of the pile foundation drops significantly;the settlement of the upper structure rises;at the same time,PSSI amplifies the seismic response of the bottom super-structure.In this study,the pile-soil-structure dynamic interaction was clarified during soil liquefaction,it was helpful for establishing and optimizing the aseismic design method of pile foundation in liquefied soil.