摘要
近几年来，有关场地影响烈度统计特性的研究取得了令人瞩目的进展，可概括为：①论证了场地影响烈度与相应频次之间存在着对数直线关系，这是场地影响烈度最基本的统计特性；②利用这种统计特性，可以预测场地未来一定时段内可能遭遇的最大影响烈度；③应用极值理论，分析场地影响烈度资料，可以得到具有概率含义的工程抗震设防依据；④随着分析处理方法的不断改进，也可以直接用影响烈度资料，进行场地地震危险性分析。因其不确定因素比较少，在工程地震中已崭露头角。
In recent years, there are exciting developments made in the studies of statistic characteristics ofresponse intensity at different sites, mainly as follows:(1)the existence of a logarithmic linear rela-tionship between response intensities at different sites and corresponding frequency has been proved,and this is the most fundamental statistic feature of response intensities at different sites;(2)usingsuch statistic feature, the maximum response intensity at a given site in a certain future period of timecan be anticipated;(3)using the extremal theory for analysing the data of response intensities at dif-ferent sites,the antiseismic defence parameters of probabilistic implication can be obtained for engi-neering projects;(4 )with the analysis and processing methods improved constantly,the data of re-sponse intensities at different sites can be directly used to analyse the site seismic risks. Because thereare fewer indeterministic factors,it has become very promising and widely applied in engineering seis-mology.
出处
《国际地震动态》
1994年第12期1-6,共6页
Recent Developments in World Seismology
关键词
地震烈度
地震工程
危险性
response intensity
statistic characteristics
engineering seismology
extremal theory
seismic risk analysis
antiseismic parameter
