摘要
我国新的地震区划图(1990年版)是采用地震危险性慨率分析方法编制的。该图给出的是场点地震烈度值,该值在50年内被突破的概率为0.1。人们普遍关注该图与我国曾经编制的地震区划图(1957年版,1977年版)的区别,该图超越概率概念的内含和外延以及超越概率水平为什么采用50年超越概率0.1。本文围绕这些问题进行了讨论。分析结果表明,前两张地震区划图编图的基本着眼点都是地震预测,而新的地震区划着眼于场点的地震动预测。新的地震区划图是按场点地震危险性分析方法给出的,它所表示的地震危险性只能针对具体的场点,不能完全反映区域的地震危险性特征。而弄清场点地震危险性和区域地震危险性的差异是正确进行区域防灾对策的基础。作者希望这些讨论能对正确使用新的地震区划图有所裨益。
The Chinese new seismic zoning map(1990 version)is compiled by using the method of seismic hazard analysis. The intensities noted in this map is the intensity of specific site. The exceeding probability of this value is 0. 1 within 50 years. It is different from the seismic zoning maps of China which were compiled in 1957 and 1977. The users concern the concept of exceeding probability and probability level of 0. 1 in 50 years adopted by the new zoning map. These questions are discussed in this paper. The previous two maps focused on the prediction of earthquake, while the new zoning map focus on the prediction of ground motion. The zoning map represents the seismic hazard of a specific site, not the regional hazard totally. It is very important for taking countermeasures of regional earthquake disaster to understand this distinction. We hope the above discussion will be benifit to the using of the new zoning map.
出处
《中国地震》
CSCD
北大核心
1993年第2期97-103,共7页
Earthquake Research in China
关键词
地震
区划图
地震动
超越概率
场点
Seismic zoning map Seismic ground motion Exceeding probability Site Region
