Abstract Using the acceleration waveform records of 214 strong seismic stations in Beijing-Tianjin-Hebei region captured by the M5.1 earthquake in Guye district of Tangshan city on July 12, 2020, we analyze the variation characteristics of the records number with the epicenter distance and draw the contour map of peak acceleration. We compare the linear elastic response spectrum recorded by 6 soil stations with the designed spectrum of China, and analyze the amplification effect of soil layers on ground motion using the traditional spectral ratio method. By comparing the observed data with some commonly used GMPE(ground motion prediction equations), we analyze the attenuation relationship of PGAs with different distance. By calculating the normalized residuals between predicted and observed values, we discuss the influence of deep overburden soil and soft soil on ground motion. We study the effects of local site conditions on the amplitude and main period of ground motion, plot the spatial distribution of the spectral acceleration with different period, and explain why the ground motion at medium distance is significantly magnified combined with the site environment.
WANG Wencai,YANG Xiaopeng,SU Xiaoyun et al. Analysis of Strong Ground Motion Characteristics and Local Site Response of the 2020 Tangshan M5.1 Earthquake[J]. jgg, 2021, 41(10): 1063-1068.
WANG Wencai,YANG Xiaopeng,SU Xiaoyun et al. Analysis of Strong Ground Motion Characteristics and Local Site Response of the 2020 Tangshan M5.1 Earthquake[J]. jgg, 2021, 41(10): 1063-1068.
