一、引言所谓地震危险性,就是指某一特定地区(或场地)在今后一定时期内,可能遭遇到的最大地震破坏影响。在我国,长期以来,地震危险性是用地震烈度来表示的,有人称之为烈度区划或烈度鉴定。它既是地震学的一项基础研究,又是工程抗震的依据,它们的相互关系如图1所示。不论是新设计项目 I. INTRODUCTION The so-called seismic hazard refers to the largest earthquake damage that may be encountered in a given area (or site) in a certain period in the future. In China, seismic hazards have long been expressed in terms of seismic intensity, and some people have called it intensity regionalization or intensity identification. It is not only a basic research in seismology but also the basis of earthquake resistance in the project. Their mutual relations are shown in Figure 1. Whether it is a new design project