Abstract
The coefficient of subgrade reaction of pile during soil liquefaction is back-calculated based on large shaking table tests. The effects of soil density. relative displacement and pore water pressure ratio on the p-y relation between subgrade reaction and relative displacement are examined, and a simplified procedure to estimate time history of p-y relation is presented The p-y relations computed by the proposed method are in good agreement with the experimental ones. irrespective of depth, level of input motion and soil density, indicating that the proposed method is promising for estimating p-y relations during soil liquefaction.
