Inversion Method of Bedrock Ground Motion in Layered Soil

In order to obtain relatively reliable and accurate earthquake motion inputs at the bedrock, This paper presents a method that can be respectively used to inverse bedrock ground motion based on surface motion, because soil is nonlinear material, the linear Inversion method is inaccurate, a simplified method is adopted to solve deformation modulus and damping ratio in order to establish dynamic constitutive. Finally, in connection of actual project of high-piled quay, the input ground motion in the Bedrock is obtained by the inversion method based on the surface motion, the result shows that the method is simple and easy to grasp, has high precision.