[1]张效亮,张郁山,吴昊.地震动衰减关系中震中距和断层源距转换[J].地震工程与工程振动,2018,(01):178-189.[doi:10.13197/j.eeev.2018.01.178.zhangxl.020]
 ZHANG Xiaoliang,ZHANG Yushan,WU Hao.The relationship between the point-source distance and the fault-source distance in ground motion prediction equation[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2018,(01):178-189.[doi:10.13197/j.eeev.2018.01.178.zhangxl.020]
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地震动衰减关系中震中距和断层源距转换
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《地震工程与工程振动》[ISSN:/CN:]

卷:
期数:
2018年01期
页码:
178-189
栏目:
论文
出版日期:
2018-06-30

文章信息/Info

Title:
The relationship between the point-source distance and the fault-source distance in ground motion prediction equation
作者:
张效亮 张郁山 吴昊
中国地震灾害防御中心, 北京 100029
Author(s):
ZHANG Xiaoliang ZHANG Yushan WU Hao
China Earthquake Disaster Prevention Center, Beijing 100029, China
关键词:
衰减关系距离转换断层投影距震中距断层距
Keywords:
NGA GMPEdistance conversionepicentral distance REPIJoyner-Boore distance RJBsource-to-site distance
分类号:
P315.9
DOI:
10.13197/j.eeev.2018.01.178.zhangxl.020
摘要:
采用"虚拟断层法"给出了地震动衰减关系中震中距和断层源距转换关系。首先,根据已有资料利用经验公式确定虚拟有限断层破裂参数(L,W,φ,δZTORhypX,hypY),针对断层走向φ没有经验公式可用的情况,给出了不同时间尺度下的断层走向确定方案。然后,利用上述7个破裂参数,联合震中距REPI和场点震中方位角θ,或者震中经纬度LLEPI和场点经纬度LLSITE,计算4个断层源距(RJBRRUPRXRY0),无需获取有限断层模型端点经纬度。在此基础上,初步对比了震中距REPI和断层源距(RJBRRUP)的差异及其对PGA的影响,总体上存在REPIRJBREPIRRUPREPI产生的PGA介于RRUPRJB之间,距离差异和PGA差异都随震级增加而增大,随距离增加而缩小最后趋于一致。本文方案可以较好的处理震中距和断层源距引起的地震动差异问题,在地震动预测图ShakeMap制作、核电等重大工程地震安全性评价和新的水工建筑设定地震反应谱确定方面具有一定应用价值。
Abstract:
In this paper, conversion equations of point-source epicentral distance and fault-source distances in seismic attenuation relation are derived using "Virtual Fault Method". First of all, virtual finite fault rupture parameters (L, W, φ, δ, ZTOR, ypX, hypY) are determinated according to the available data using the empirical formulae. In view of the fact that no empirical formula is available for the fault strike direction φ, this paper presents a scheme for determining the fault strike direction in different time scales. Then, four source-to-site distance measrues (RJB, RRUP, RX, RY0) were calculated by using the above seven rupture parameters, combined with epicentral distance REPI and epicenter-to-site azimuth θ, or epicentral latitude and longitude LLEPI and site latitude and longitude LLSITE, without obtaining the latitude and longitude of finite fault endpoint. Based on the above formulae, the differences between the point-source epicentral distance (REPI) and the fault-source distances (RJB, RRUP) and its effect on the PGA are compared. In general, there are REPIRJB and REPIRRUP. The PGA generated by REPI is between RRUP and RJB. The difference of distance and PGA gradually increase with the increase of magnitude, and decrease with the increase of distance. To some extent, the problem of ground motion caused by epicentral distance and fault source distance can be solved. It has a certain application in ShakeMap production, seismic safety evaluation of major projects such as nuclear power and the determination of design response spectrum of hydraulic structures based on scenario earthquake.

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备注/Memo

备注/Memo:
收稿日期:2017-03-10;改回日期:2017-06-17。
基金项目:地震行业专项(201408020);中国地震灾害防御中心主任基金项目(201704);地震科技星火计划项目(XH17052)
作者简介:张效亮(1984-),男,高级工程师,硕士,主要从事地震危险性研究.E-mail:zxl.icd@gmail.com
更新日期/Last Update: 1900-01-01