缺乏地震动加速度记录地区地震动估计的映射法

本文提出了缺乏地震动加速度记录地区地震动估计的映射法、此法的关键步骤是利用缺乏地震动加速度记录地区Ｂ和已有足够地震动加速度记录地区Ａ的地震烈度衰减关系的映射法，从而求得此两地区的映射地震对，使地震对中的地震所给出的两地区的地震烈度相同。

A METHOD FOR EVALUATION OF GROUND MOTION IN REGIONS WITH FEW ACCELERATION OBSERVATION DATA

method of mapping is suggested here for the evaluation of the ground motion parameters for regions with few acceleration observation data.This method assumes that,for a region A of enough acceleration observation data and a region B of few such data,earthquake pairs(MA,RA;MB,RB) exist in the intensity attenuation curves IA(MA,RA) of region A and IB(MB,RB) of region B so that they give not only the same intensity I but also the same ground motion Y.The major step is to find the earthquake pairs(MA,RA;MB,RB) from the intensity attenuation curves of both region A and region B,by mapping of two sets of intensity attenuation curves,so that IA(MA,RA)=IB(MB,RB).The suggested method has three major advantages over the current ones.Firstly,there is no need to try hard to find a functional relationship among the required parameter Y of ground motion, intensity, and seismological and site parameters,because such a relationship is usually not easy to find for some parameters of ground motion,such as the strength envelope of the ground motion time history.Secondly, any ground motion parameter can be estimated by the method suggested here.Thirdly,seismo-geological background of regions is cosidered in the consideration of the differences of the intensity attenuations in regions.