[1]陶小三,李细兵,彭小波,等.苏北沿海潜在震源区调整对地震危险性评估影响[J].华南地震,2024,(04):116-125.[doi:10.13512/j.hndz.2024.04.13]
 TAO Xiaosan,LI Xibing,PENG Xiaobo,et al.Influence of Adjustment in Potential Seismic Sources of Coastal Areas of Northern Jiangsu Province on Seismic Risk Assessment[J].,2024,(04):116-125.[doi:10.13512/j.hndz.2024.04.13]
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苏北沿海潜在震源区调整对地震危险性评估影响()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2024年04期
页码:
116-125
栏目:
地震与地质灾害
出版日期:
2024-12-30

文章信息/Info

Title:
Influence of Adjustment in Potential Seismic Sources of Coastal Areas of Northern Jiangsu Province on Seismic Risk Assessment
文章编号:
1001-8662(2024)04-0116-10
作者:
陶小三李细兵彭小波薛莹莹
江苏省地震局震灾风险防治中心,南京 210014
Author(s):
TAO XiaosanLI XibingPENG XiaoboXUE Yingying
Earthquake Prevention and Disaster Reduction Center,Jiangsu Earthquake Agency, Nanjing 210014, China
关键词:
苏北沿海潜在震源区地震危险性地震动参数
Keywords:
Coastal area of northern Jiangsu Province Potential seismic source Seismic risk Ground motion parameter
分类号:
P315.9
DOI:
10.13512/j.hndz.2024.04.13
文献标志码:
A
摘要:
江苏持续开展地震危险源探查,苏北沿海地区潜在震源区发生较大调整,从而对该区域的地震灾害风险评估、重大工程抗震设防要求等产生直接影响。为评估潜在震源区调整给苏北沿海地区地震危险性造成的影响,采用常规地震危险性概率分析方法,从基岩峰值加速度、场地基岩反应谱、平均场地条件下基本地震动参数分区等方面进行分析研究,研究结果表明:潜源变化区域峰值加速度值有显著增加,沿剖面最大增幅达到27%,主要有盐城潜源、东台潜源、海安潜源;各调整潜源对峰值加速度值贡献均有较大幅度的增加,呈主要贡献;而长周期部分的潜源贡献主要来自于附近高震级瑶沙潜源,没有发生显著变化;与第五代地震动参数区划图分区相比,平均场地条件下基本地震动参数分区在苏北沿海盐城地区有较大变化,主要盐城城区由原0.10g调整到0.15g,建湖城区由0.05g调整到0.10g,其余变化较小。
Abstract:
Seismic risk source exploration was carried out continuously in Jiangsu Province. The potential seismic sources in coastal areas of northern Jiangsu Province have undergone great adjustments, which will have a direct impact on the seismic risk assessment and seismic fortification requirements of major construction projects in the areas. In order to evaluate the influence of adjustment in potential seismic sources on seismic risk in coastal areas of northern Jiangsu Province,this paper used the conventional probability seismic hazard analysis (PSHA) method to analyze the bedrock peak acceleration, response spectrum of site bedrock, and basic ground motion parameter zoning under average site conditions. The results show that the peak acceleration in the changed potential seismic sources has increased significantly, and the maximum increase along the profile reaches 27%, mainly in Yancheng potential seismic source, Dongtai potential seismic source, and Haian potential seismic source. The contribution of changed potential seismic sources to the peak acceleration increases significantly,showing the main contributors. However, the contribution of potential seismic sources to the peak acceleration in the long term part mainly comes from the nearby high-risk Yaosha potential seismic source, and there is no significant change. Compared with the fifth-generation ground motion parameter zoning map,the basic ground motion parameter zoning under average site conditions has a large change in Yancheng region of the coastal areas of northern Jiangsu Province. The main Yancheng City is adjusted from 0.10 g to 0.15 g,and the Jianhu City is adjusted from 0.05 g to 0.10 g,with the rest areas changing slightly.

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备注/Memo

备注/Memo:
收稿日期:2024-05-23
基金项目:江苏省地震灾害风险普查项目(江苏省重大基础设施安全保障协同创新中心地震灾变破坏防治团队:2021-2024)
作者简介:陶小三(1976-),男,高级工程师,主要从事地震灾害防治研究。E-mail:txs3880@163.com
更新日期/Last Update: 2024-12-30