Abstract
Seismic ground motions on layered media with irregular interface are not uniform because of the effects of focusing and scattering effects. In Aki-Larner method, the scattered wave field is represented by the combination of the plane wave, and the coefficients that satisfy the boundary condition approximately are determined. Subsurface conditions embrace many uncertain factors such as the assessment of irregularities in interfaces and properties of the layered media. In this paper, we developed stochastic Aki-Larner method with which to investigate the effects of the variation of subsurface soil profile. The first order approximation method and perturbation technique are incorporated in Aki-Lamer method, and estimate the seismic ground responses taking into account the uncertain modeling of irregular interfaces.
