抄録
This paper presents the simulation analysis about damage of structure supported by pile subjected to very large seismic motion during the 1995 Hyogoken-Nambu Earthquake by 3D-FE analyses considering an effect of non-linearity between pile and soil. The input motion is evaluated by the observed record and 2D-FE analysis using the deep irregular under-ground model with vertical discontinuity. The major finings obtained from analyses are summarized as follows:1) the FE analysis can simulate the distribution of damage of pile cap in the observation in which the pile in group of 2 piles was damaged heavily, 2) In the instance, the subgrade reaction for pile in group of 2 piles is larger than in group of 3 or 4 piles, furthermore the subgrade reaction for pile in group of 3 or 4 piles is affected by the behavior of the adjacent build-ing and decreases. These may be causes of the distribution of damage of pile cap, 3) the pile cap damage in the instance may be caused by the piles were subjected to the very large inertial force and the ground displacement at the same time.
