Comparative Analysis of Two Seismic Response Analysis Programs in the Actual Soft Field

Abstract

SHAKE2000 and DEEPSOIL are the two most important programs to calculate the response analysis of soil layer. In order to analyze the similarities and differences between them, and to guide the improvement of the method and program of seismic response analysis of soil layer, 25 KiK net seismic records from 9 stations were selected as the research objects in this paper, from the aspects of surface acceleration, acceleration response spectrum and maximum shear strain of the surface. SHAKE2000 and DEEPSOIL are used to calculate the soft soil site.The results showed that when the soil nonlinearity is not obvious, most of the differences of PGA results calculated by SHAKE2000 and DEEPSOIL can be ignored. The error of the maximum value of soil shear strain calculated by SHAKE2000 and DEEPSOIL is less than 20%. When the soil nonlinearity is obvious, only a few of the differences of PGA results can be ignored, and the error of the maximum value of soil shear strain calculated by SHAKE2000 and DEEPSOIL is less than 20%. In most cases, the acceleration response spectra calculated by SHAKE2000 and DEEPSOIL are not different. Based on the measured records, there are great differences between the calculated results of SHAKE2000 and DEEPSOIL and the measured records, but generally, the calculation method of SHAKE2000 is better than DEEPSOIL and SHAKE2000 is closer to the strong earthquake records.