Abstract:The ground motion parameters of bedrock and soils were acquired by field experiments, using an artificial blast wave as the seismic source. Field drilling was conducted and the corresponding data was obtained, and then, the seismic response analysis was carried out by equivalent linearization. The rationality of the conclusion is discussed through comparisons between the calculated and measured values. The peak acceleration comparison results show that the equivalent linearization method is better for class Ⅱ sites, and the calculated values of surface peak acceleration match well with the measured values. For class Ⅲ sites, there are relatively large discrepancies between the calculated and measured values, which vary with the overburden thickness. According to the comparison results of acceleration response spectrum, both the calculated and measured values of peak ground acceleration response spectrum are larger than those of bedrock input, and the measured values are greater than the calculated values. The width of the acceleration response spectrum is closely related to the site category, and the width of the acceleration response spectrum of class Ⅲ site is significantly larger than that of class Ⅱ site; moreover, the measured values of the two types of sites are both larger than the calculated values.
