Three-dimensional nonlinear finite-difference analysis for seismic soil–micropilestructure interaction; Effects of nonlinearity of soil and micropile-soil interface

摘要

This paper focuses on the behavior of micropiles group under seismic loading. A three-dimensional finite-difference analysis in the time domain is carried out to investigate the effects of soil nonlinearity and sliding at the micropile-soil interface on the seismic response of a micropiles group. Proper boundary conditions are used to simulate radiation effects of infinite half space. The study shows that the nonlinearities of the soil and micropile-soil interface both have significant effect on the seismic response of the micropiles group as well as that of structure.