Inversion Of Obliquely Incident Earthquake Round Motion In Layered Poroelastic Sites

Incident earthquake ground motion has been an necessary condition in the analysis of seismic response and structural aseisnic calculation. It has important engineering significance for study of inversion of incident earthquake ground motion.This paper proposes a method for inversion of obliquely incident earthquake ground motion in layered elastic half-space, in which, the exact stiffness of soil layer and half-space are used for the inversion of incident acceleration time history and incident angle from surface horizontal and vertical acceleration records. The method of inversion is verified by an example of incident SV waves. The paper also discusses the error in traditional1-D inversion model, in which, the incident horizontal acceleration time history is inverted from the surface horizontal acceleration record.The method of nonlinear inversion of obliquely incident earthquake ground motion in layered elastic half-space based on the linear inversion and using equivalent linear method, is verified by an example of incident SV waves. The paper also discusses the error in traditional1-D inversion model, in which, the incident horizontal acceleration time history is inverted from the surface horizontal acceleration record.On this basis, the paper further proposes a method for inversion of obliquely incident earthquake ground motion in layered poroelastic sites, in which, the exact stiffness of saturated soil layer and half-space are used for the inversion of incident acceleration time history and incident angle from surface horizontal and vertical acceleration records. The method of inversion is verified by an example of incident SV waves. The method of nonlinear inversion of obliquely incident earthquake ground motion in layered poroelastic sites based on the linear inversion and using equivalent linear method, is verified by an example of incident SV waves.