Three-dimensional finite element numerical model for dynamic soil-pile interaction is established based on shaking table test using OpenSees. The validity and effectiveness of the numerical model are verified by the results of shaking table test. The effects of sand permeability

friction angle of sand

relative density of sand

thickness of overlying clay and pile diameter on characteristics of dynamic p-y curves are studied based on the numerical model. The results show that the area of hysteresis loop of dynamic p-y curves increases after soil liquefaction. The change of permeability of sand has great influence on the growth trend of excess pore pressure. The area of hysteresis loop of dynamic p-y curves decreases with the increase of friction angle

relative density of sand and thickness of overlying clay. The area of the hysteresis loop enlarges with the increase of the pile diameter.