Abstract
This paper describes the dynamic characteristics of two-dimensional rigid structure embeded in a perfectly elastic layer over a half-space by investigating the numerical results about the analytical solutions of the governing equations on the soil-structure interaction system subjected to base rock motion. The out line will be described in the following items bellow : 1. Both the sway and the rotational spring constants nearly equal to zero or to infinity at the resonance frequency of one-dimensional rotational wave or dilational one which is vertically propagating in the layer, respectively. 2. The dynamical wave pressure which operates on the basement wall subjected to horizontal base rock motion nearly equals to infinity at the resonance frequency of both rotational wave and dilatational one. 3. If the structure with small aspect ratio is pertinently buried in the layer medium, the rotational response of it can be been minimum.
