A BASIC STUDY TO IDENTIFY THE INCIDENT SEISMIC WAVE ON THE BASE LAYER IN TIME DOMAIN

Abstract

The incident seismic wave on the base layer is generally calculated on frequency domain using multiple reflection theory from the observed records on the ground surface or in the borehole. In this case, the equivalent linear model is employed to approximate the non-linear behavior of soil. However, the equivalent linear model is not suitable for simulations under strong shaking. In this paper, a backward calculation method to identify the incident wave in time domain is proposed for applying non-linear analysis. Numerical examples are conducted to examine the accuracy and stability of this method.