Abstract
Based on a convolution type Green function derived from distributed force application to the 2-dimensional linear elastic body, the transient wave field in the dynamic soil-structure interaction is thoroughly investigated by the time-domain BEM, when the soil is modeled either by a halfspace or by a stratum. The Rayleigh wave generation for the former case and the eigenmode wave propagation for the latter case are clarified. Depending on the period ratio between Ricker wave type loading and the natural period of stratum, the resonance/wave impediment phenomenon of the stratum soil in contrast to the halfspace, is focused. Further, a flat buried block system (called WIB) below the foundation proved to be an effective wave impeding measure, provided that it is installed at a proper depth over a sufficient width.
