Abstract：Based on the results of the first national earthquake disaster risk survey, we calculate and analyze the proportional relationship and spatial distribution characteristics of peak acceleration under different levels of exceedance probability in Hubei region. Using the macro site category data of Hubei Province, we calculate the proportion relationship of surface peak acceleration under frequent earthquakes, basic earthquakes, and fortified earthquakes. In the 0.05 g acceleration zone, the mean of the 50 years exceedance probability of 63% and 10% peak acceleration ratio(R63/R10) for sites in Hubei Province is 0.31, and the mean of the 50 years exceedance probability of 2% and 10% peak acceleration ratio(R2/R10) is 1.81; in the 0.10 g acceleration zone, the mean of R63/R10 is 0.30, and the mean of R2/R10 is 1.80; in the 0.15 g acceleration zone, the mean of R63/R10 is 0.17, and the mean of R2/R10 is 1.98. We comparatively analyze the proportion required by mandatory national standards such as current seismic design specifications for buildings and China’s seismic parameter zoning map. We infer that the seismic danger is reasonably safe in Hubei province, if rules of code for seismic design of building are followed. The peak ground motion acceleration value of frequent earthquakes should be adjusted to not less than 1/3 of the basic peak ground motion acceleration when conducting earthquake hazard analysis, earthquake disaster risk prevention and control work in high intensity areas, such as Zhushan and Zhuxi in Hubei province. The research results of this article will contribute to the promotion and application of earthquake risk survey results in Hubei province.
YU Song,WU Jianchao,HU Qing et al. The Proportional Relationship between Ground-Motion Peak Accelerations under Different Exceeding Probability Levels in Hubei Province[J]. jgg, 2024, 44(5): 503-509.
