EFFECTS OF STRESS-DILATANCY BEHAVIOR OF SOIL ON LOAD TRANSFER HYSTERESIS IN SOIL-PILE INTERACTION

摘要

This paper examines the nonlinear hysteretic characteristics of load transfer between soil and piles for random loading. First, we demonstrate that in past experiments the mobilized lateral soil resistance to piles varies with cyclic loading patterns. The soil resistance mobilized against one-sided cyclic loading is smaller than that mobilized against fully-reversed cyclic loading. We then establish that the stress-dilatancy behavior of soil causes such a loading pattern dependency, based on the mechanical property of soil elements subjected to cyclic compression-extension deformation. Finally, the hysteretic characteristics of load transfer between soil and pile associated with the stress-dilatancy effect is modeled as a function of cyclic loading pattern.