Abstract
The authors investigate into mechanism of behavior of pile foundation during ground displacement caused by liquefaction based on shaking table tests and numerical analyses. As a result, it is clear that characteristic of force depend on liquefaction-induced ground displacement is the drag force in proportion to the flow velocity of ground when the pore water pressure ratio was over 0.9 and the earth pressure caused by the ground displacement when pore water pressure ratio was below 0.9. They propose design method of foundation considering change of characteristic of ground displacement force.
