Abstract:We test and analyze the soil layer test, equivalent shear wave velocity and microtremors of strong vibration stations in Hubei earthquake early warning network, calculate the superior frequency and RMS of acceleration, and compare the site types using equivalent shear wave velocity and predominant frequency. The results show that: 1) The RMS of acceleration of all stations meets the requirements of the technical guidelines for basic station site selection of the national early warning project, which is less than 0.01 m/s2. 2) There is a big difference between the predominant frequency calculated by shear wave velocity and microtremors test in the analysis on site type. The predominant frequency of microtremors test is higher than that calculated by shear wave velocity. Therefore, various testing and analysis methods should be integrated in the classification of site types in the future. We further determine regional site types by combining borehole data and measured shear wave velocity.
LI Deqian,WEI Guichun. Background Test and Preliminary Analysis of Strong Motion Stations in Hubei Earthquake Early Warning Network[J]. jgg, 2023, 43(6): 651-655.