Abstract
In order to clarify nonlinear interaction between pile and its surrounding soil under seismic load, static and dynamic loading tests of RC piles in sand soil are conducted. As a result, the maximum damaged depth of pile, which controls the horizontal restoring force at the pile head, is governed by the relative stiffness between pile and soil. Moreover, it is clarified that the restoring force characteristic of RC pile-soil system is dependent on a repetition of cycles rather than loading velocity within the condition of these tests. Additionally, according to the results of 3-dimensional finite element analysis, the applicability of the analytical method for simulating the behavior of RC pile-soil system is verified.
