我国概率地震区划图的检验  

Test of PSHA maps of China

作　　者：王立媛[1] 陶夏新[1,2] 陶正如[1] 姜伟[1] WANG Liyuan;TAO Xiaxin;TAO Zhengru;JIANG Wei(Key Laboratery of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics,China Earthquake Administration, Harbin 150080,China;Harbin Institute of Technology, Harbin 150090,China)

机构地区：[1]中国地震局工程力学研究所,中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [2]哈尔滨工业大学,黑龙江哈尔滨150090

出　　处：《地震工程与工程振动》2018年第1期28-33,共6页Earthquake Engineering and Engineering Dynamics

基　　金：中国地震局工程力学研究所基本科研业务费专项资助项目(2017B12);中国国家自然科学基金项目(51778151,51311120080,51778197);中国国家国际科技合作项目(2011DFA21460);俄罗斯基础研究科学基金项目(RFBR13-05-91167).

摘　　要：本文从概率地震区划图是否可以检验的讨论切入,阐述了检验概率区划图的思路。收集、整理区划图颁布以后发生的5级以上(含)地震的等震线数据,在GIS平台上建立了投影方式、投影参数、比例尺一致的地震区划图和等震线信息系统。对等震线不完全、没有等震线数据的地震,借助GIS空间操作的功能、据地震动衰减关系推算,生成、完善相应的等震线。将各个地震的等震线图逐一叠加在区划图上,留大舍小,生成最大烈度差图层。统计出各正烈度差的分布范围,低估、严重低估的总面积及相应的百分比。据此,建议了区划方法改进的研究重点。Starting from the argument if seismic zoning map compiled by probabilistic procedure could be tested,a way to test probabilistic zoning map is presented in this paper. The isoseismals of earthquakes with magnitude no less than 5 occurred after the map issued are collected,and then an information system of seismic zoning map and isoseismals is built on GIS platform with the same projection manner and same parameters. For those quakes without or with just incomplete isoseismal data,the isoseismials are generated or completed by regional attenuation relationship and the spatial manipulation functions of GIS. The isoseismals are overlaid on the zoning map one by one,and the largest Intensity difference is kept for each area,finally a maximum Intensity difference map is worked out. The areas with positive Intensity difference are marked. The total areas with underestimation and badly underestimation on the zoning map are counted up and percentages of them to the corresponding total areas on China main land are analyzed. The main point for improvement of the zoning is suggested from the test.

关 键 词：地震区划图 等震线 检验 GIS 

分 类 号：TU4[建筑科学—土工工程]