基于地震带细致划分为地震构造区的概率地震危险性分析

PSHA based on the seismogenic structure source zones in seismogenic belts

在我国当前地震安全性评价中,普遍使用考虑地震活动时空不均匀性的概率地震危险性分析方法(CP-SHA),它规定以地震带为统计区域计算地震活动性参数b值和v4值。正在编制的中国地震动区划图(五代图)提出了针对潜在震源区进行三级划分原则:划分地震带、地震带上划分地震构造区、地震构造区内再划分潜在震源区。本文提出以地震构造区为统计区域回归统计方法计算b值和v4值,然后进行概率危险性分析计算,这样得到的结果可能更为合理。

In order to assess the seismic safety of engineering sites in China,the Probabilistic Seismic Hazard Analysis is widely used,that considers the seismicity as heterogeneity in spatial-temporal domains(abbreviated to CPSHA).In CPSHA b-value and v4-value of seismicity parameters describing the seismic activity of seismogenic potential source zones are calculated according to the statistical regions of the seismogenic structure belts.The new seismic ground motion parameter zoning map of China,the fifth generati...