考虑俯冲带潜在震源区的地震危险性算法研究及在中国海域的应用

李昌珑; 温增平

doi:10.11899/zzfy20210107

考虑俯冲带潜在震源区的地震危险性算法研究及在中国海域的应用

doi: 10.11899/zzfy20210107

李昌珑^{1, 2,},
温增平^1, ,

1.
中国地震局地球物理研究所，北京 100081
2.
中国地震局乌鲁木齐中亚地震研究所，乌鲁木齐 830011

基金项目: 国家重点研发计划（2017YFC1500405）；中国地震局地球物理研究所基本科研业务费专项（DQJB21Z15）

详细信息

作者简介:
李昌珑，男，生于1989年。副研究员。主要从事地震危险性和地震风险分析研究。E-mail：changlongli@163.com

通讯作者:
温增平，男，生于1964年。副研究员。主要从事工程地震学、地震风险分析研究。E-mail：wenzp@cea-igp.ac.cn

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- 文章访问数: 78
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- 被引次数: 0
出版历程
- 收稿日期: 2020-12-20
- 网络出版日期: 2021-07-12
- 刊出日期: 2021-03-31

Study on Seismic Hazard Assessment Algorithm Considering Seismogenic Sources of Subduction Zones and Its Application on Chinese Marine Territory

Li Changlong^{1, 2
,},
Wen Zengping^{1
, ,}

1.
Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
2.
Urumqi Institute of Central Asia Earthquake, China Earthquake Administration, Urumqi 830011, China

摘要

摘要:
本文研究了俯冲带潜在震源区离散化方法及考虑俯冲带高震级地震震源破裂面和震源深度的场点地震动计算方法，推导了俯冲带潜在震源区地震危险性计算公式，并使用中国海域及邻区地震危险性模型进行地震危险性试算。结果表明，本文建立的考虑俯冲带潜在震源区的地震危险性算法能够实现场点地震危险性计算时对俯冲带高震级地震震源破裂面和震源深度的考虑。
- 地震危险性 /
- 地震区划 /
- 海域地震 /
- 俯冲带 /
- 三维潜源
Abstract:
This paper studies the discretization method of the seismogenic sources of the subduction zone and the ground motion calculation method considering the source rupture surface and focal depth of the high-magnitude earthquakes in the subduction zone. The calculation formula for the seismic hazard of the seismogenic sources of the subduction zone is derived, and the preliminary seismic hazard calculation for Chinese marine territory is tested. The main conclusions are: the seismic hazard algorithm established in this paper considering the seismogenic sources of the subduction zone can realize the consideration of the source rupture surface and focal depth of the high-magnitude earthquake in the subduction zone in the seismic hazard calculation of the site.
- Seismic hazard /
- Seismic hazard mapping /
- Marine earthquake /
- Subduction zone /
- 3D seismogenic sources

HTML全文

图 1 俯冲带构造示意图

Figure 1. Tectonics of a subduction zone

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图 2 俯冲带潜在震源区模型示意图

Figure 2. A seismogenic source model on a subduction zone

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图 3 俯冲带潜源1个子源的M_j级地震产生的破裂面空间范围示意图

Figure 3. Spatial range of a rupture surface by a magnitude M_j earthquake on a subduction zone

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图 4 各子源生成破裂面原理示意图

Figure 4. Theory of rupture surfaces generating for each sub-sources of a source

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图 5 中国海域及邻区潜在震源区划分图

Figure 5. Seismogenic sources in Chinese oceanic area and surrounding areas

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图 6 中国海域及邻区50年超越概率10%的PGA分布图

Figure 6. Map of PGA with 10% probability of exceedance in 50 years for Chinese oceanic area and surrounding areas

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图 7 4个场点考虑和不考虑俯冲带潜在震源区的50年超越概率10%的地震动反应谱

Figure 7. Earthquake response spectrum with 10% probability of exceedance in 50 years considering and without subduction sources for the 4 sites

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图 8 4个场点考虑和不考虑俯冲带潜在震源区的50年超越概率2%的地震动反应谱

Figure 8. Earthquake response spectrum with 2% probability of exceedance in 50 years considering and without subduction sources for the 4 sites

下载: 全尺寸图片幻灯片

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