DYNAMIC RESPONSE OF A LAYERED SATURATED GROUND SUBJECTED TO A BURIED MOVING LOAD

The dynamic response of a layered poroelastic ground under a buried moving load is analyzed using the Fourier transform and the transmission and reflected matrices (TRM) method. The soil is idealized as a fully saturated poroelastic medium conforming to the Biot's theory. A modified hysteretic damping model is introduced to describe the visco-elastic behavior of the soil. The layered property of the poroelastic half-plane is solved by using the TRM method. Using the Fourier and the inverse Fourier transforms, the integral form solutions for the dynamic response of a layered saturated half-plane under a buried moving load are obtained. When the layered half-plane is reduced to a homogeneous layer with rigid bedrock, the results obtained in this paper are in good agreement with other published results. The influence of the depth of load, buried load speed, load frequency, and the interlayer to the dynamic response is also analyzed by numerical calculation.