Abstract
This paper describes a theoretical study concerning soil-structure dynamic interaction problems on an alluvial medium. The dynamic interaction of a poroelastic half space is investigated using an analytical model based on aggregate theory. The following results have been obtaind in this study, (1) Dynamical Poisson's ratios of grounds with high-water level depend upon coefficients of permeability and frequency of vibratory force. (2) Difference of results for vertical excitement between two boundary conditions on permeability is much larger than one for horizontal excitement. (3) Dynamical Poisson's ratio of water-saturated ground with high permeability such as sandy soil ground nearly equals to one of soil skeleton itself without water. (4) Dynamical Poisson's ratio of water-saturated ground with low permeability such as clay ground nearly equals to 0.5. (5) The model that consists of porous elastic body and pore water could examine complex dynamical interaction mechanism between porous elastic body and pore water by surveying permeability coefficient and porosity, Poisson's ratio and velocity of shear wave on real soil ground.
