Abstract
Although nonlinear dynamic ground properties are necessary for a backward calculation to identify an incident wave in time domain, it is difficult to select the suitable parameters for a set of vertical array records. GA (Genetic Algorithm) and the non-iterative time integration method are applied to the parameter selection. Numerical examples are conducted to examine the accuracy of the identified incident wave, and dynamic ground parameters at Port Island vertical array point are computed to verify the applicability for a large-degree-of-freedom. These results show the availability of the parameter estimation method for the backward calculation of incident wave.
