A practical probabilistic earthquake hazard analysis tool: case study Marmara region

A practical probabilistic earthquake hazard analysis tool: case study Marmara region
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实用的概率地震灾害分析工具:马尔马拉地区案例研究

DOI:
10.1007/s10518-020-00793-4
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发表时间:
2020
影响因子:
4.6
通讯作者:
Sianko I
Sianko I
中科院分区:
工程技术2区
文献类型:
--
作者:
Sianko I

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地震对社区的经济福祉和复原力产生破坏性影响,特别是在发展中国家。地震危险性评估是采取预防、准备和响应或恢复行动以降低地震风险的第一步。本文提出了一个计算工具,预测在宏观层面上的地震危险性的一部分,一个全面的多灾害框架的地震风险评估。概率地震危险性分析(PSHA)程序是基于蒙特-卡罗方法,并特别注意在研究区分配的震源区的定义。泊松和时间相关(更新)模型被用来量化地震事件之间的时间相关性的影响,而近场破裂方向性的影响也被考虑在内。选择土耳其的马尔马拉地区作为案例研究区,进行新的地震危险性分析,并验证所提出的工具的准确性。结果表明,从最近的SHARE项目和最新的土耳其地震设计规范危险图的结果很好的协议。这证实了所提出的PSHA方法可以是一个有吸引力的替代直接集成为基础的方法,由于其实用性和强大的处理不确定性。
Earthquakes have a damaging impact on the economic welfare and resilience of communities, particularly in developing countries. Seismic hazard assessment is the first step towards performing prevention, preparedness, and response or recovery actions to reduce seismic risk. This paper presents a computation tool for predicting the seismic hazard at the macro level as a part of a comprehensive multi-hazard framework on earthquake risk assessment. The probabilistic seismic hazard analysis (PSHA) procedure is based on the Monte-Carlo approach, and particular attention is paid to the definition of source zones assigned in the study area. Both Poisson and time dependent (renewal) models are adopted to quantify the effect of temporal dependencies between seismic events, while near-field rupture directivity effects are also taken into account. Marmara region in Turkey is selected as a case study area to perform a new seismic hazard analysis and verify the accuracy of the proposed tool. The results show good agreement with results from the recent SHARE project and the latest Turkish Earthquake Design code hazard maps. This confirms that the proposed PSHA method can be an attractive alternative to the direct integration based methods due to its practicality and powerful handling of uncertainties.
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