A study on parameter setting for deformation characteristics in a dynamic ground response analysis

Abstract

In this paper, setting and testing methods for deformation characteristics of soils for a dynamic ground response analysis were studied. First, we proposed a parameter setting method using an optimization technique and it was confirmed that the proposed method could set the parameters more accurately than three designers with different experience. Second, deformation characteristics tests with some cyclic numbers were carried out. The result showed that a slight difference in cyclic numbers causes quite large differences in the shear stiffness in large strain levels. In

addition, a series of ground response analyses was carried out using the above mentioned parameter setting method with some test results. The result showed that differences in the number of cycles at each strain level may affect the results of the dynamic ground response analysis. Moreover, it was also confirmed that using the shear stiffness obtained from monotonic loading test results we can accurately evaluate the dynamic response of the surface ground observed in the hybrid dynamic ground response analysis and simulate real soil behavior.