陕西关中地区不同超越概率水平下地震动峰值加速度关系研究  

Study on relationship between ground-motion peak accelerations and different levels of exceeding probability in Guanzhong area of Shaanxi province

作　　者：陈党民[1] 

机构地区：[1]陕西省地震局,陕西西安710068

出　　处：《地震工程与工程振动》2012年第3期34-40,共7页Earthquake Engineering and Engineering Dynamics

基　　金：陕西省防震减灾"十一五"重点项目(SCZC2008-450)

摘　　要：本文以关中四城市地震小区划工作为基础,统计分析了陕西关中地区不同超越概率水平下基岩地震动峰值加速度之间的关系及空间分布特征。针对中硬场地,统计得出了关中地区多遇地震、罕遇地震与设防地震作用的地面峰值加速度比值的均值分别为0.34和1.69。通过与现行建筑抗震设计规范进行了对比分析认为,若以关中城市地震小区划图作为抗震设防标准,按照《建筑抗震设计规范》(GB50011-2010)中有关规定对一般建筑物进行地震作用计算,所考虑的地震作用是合理、安全的。本文研究成果有助于地震小区划图的推广和应用。Based on the results of seismic microzonation of 4 cities in Guanzhong,statistic analysis is made for relation and spatial distribution characteristics of ground motion peak accelerations of bedrock at different levels of exceeding probability in Guanzhong region.For moderate-rigid soil sites,the average ratios of peak ground accelerations subjected to frequently occurring earthquake and rare earthquake to that of fortification earthquake are 0.34 and 1.69 in Guanzhong region.Compared with the current code for seismic design of buildings,the seismic effects will be reasonable and in safety if taking seismic microzoning map of 4 cities in Guanzhong as the earthquake fortification level and following relevant rules of Code for Seismic Design of Buildings（GB50011-2010） to calculate the seismic action on general buildings.The achievements are helpful to the application of the seismic microzoning map.

关 键 词：超越概率 比值 峰值加速度 

分 类 号：P315.9[天文地球—地震学] P315.91[天文地球—固体地球物理学]