2020年7月12日唐山古冶5.1级地震影响信息与启示

李小军; 李娜; 王玉石

doi:10.3969/j.issn.2096-7780.2020.07.001

2020年7月12日唐山古冶5.1级地震影响信息与启示

doi: 10.3969/j.issn.2096-7780.2020.07.001

李小军^{1, 2, 3, ,},
李娜¹,
王玉石^{1, 2, 3}

1.
北京工业大学城市建设学部，北京 100124
2.
中国地震局地球物理研究所，北京 100081
3.
中国地震风险与保险实验室，北京 100081

基金项目: 国家重点研发计划课题（2017YFC1500400）、国家自然科学基金项目（U1839202，51421005）、中国地震局地球物理研究所基本科研业务费专项（DQJB17T01）联合资助。

详细信息

通讯作者:
李小军（1965-），男，研究员，主要从事地震工程学研究。E-mail：beerli@vip.sina.com

中图分类号: P315
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- 文章访问数: 475
- HTML全文浏览量: 142
- PDF下载量: 39
出版历程
- 收稿日期: 2020-07-31
- 修回日期: 2020-08-10
- 网络出版日期: 2020-08-12
- 刊出日期: 2020-07-01

Information and enlightenment from the M5.1 Guye， Tangshan earthquake on 12^th July，2020

Xiaojun Li^{1, 2, 3
, ,},
Na Li¹,
Yushi Wang^{1, 2, 3}

1.
Faculty of Urban Construction，Beijing University of Technology，Beijing 100124，China
2.
Institute of Geophysics，China Earthquake Administration，Beijing 100081，China
3.
China Earthquake Risk and Insurance Laboratory，Beijing 100081，China

摘要

摘要: 2020年7月12日发生了唐山古冶5.1级地震，其强震动影响波及京津唐地区，特别是北京城区也出现了强烈的震感。中国强震动观测台网、国家地震烈度速报台网及典型建筑结构地震反应观测台阵获得大量的强震动记录。这次地震震级不大，但为地震科学研究提供了较为丰富的信息。基于获得的地震影响信息，可开展以下方面的研究：①利用地震附近及区域范围内地震烈度速报台网的密集观测记录，开展地震影响烈度快速计算分析及台网功能可靠性检测；②利用北京和天津地区的强震动观测记录，探讨深厚覆盖土层和盆地场地地震动影响；③利用京津唐地区震中距至300 km的强震动观测记录，研究京津唐地区的地震动衰减特性；④利用北京城区的建筑结构地震反应观测台阵记录，分析典型工程结构地震反应特征；⑤其他，如场地土层参数和工程结构参数反演研究等。本文针对以上关注的问题，介绍了相关初步研究工作并开展了进一步探讨性分析研究，展示了唐山古冶5.1级地震影响的丰富信息和对相关研究的潜在推进作用。
- 唐山古冶地震 /
- 强震动记录 /
- 仪器地震烈度 /
- 场地条件 /
- 结构地震反应观测台阵
Abstract: On July 12, 2020, the earthquake of magnitude 5.1 occurred in Tangshan Guye, whose strong-motion affected Beijing-Tianjin-Tangshan area, especially strong shocks also appeared in Beijing urban area. A large number of strong-motion records were obtained from the network of strong-motion observation stations, the national network of seismic intensity rapid observation stations and the structural response monitoring arrays of typical building structures. The magnitude of this earthquake is small, but it provides abundant information for seismic scientific research. Based on the information obtained on the impact of the earthquake, the following studies can be carried out: ① The rapid calculation and analysis of seismic intensity and the reliability detection of the network function based on the intensive observation records of rapid seismic intensity report network near and in the area of earthquake; ② Discussion on the influence of deep covered soil layers and basin site on ground motion based on the observed strong-motion records in Beijing and Tianjin area; ③ Study on the attenuation characteristic of ground motion in Beijing-Tianjin-Tangshan area based on the strong-motion observation records from epicenter to 300 km; ④ Analysis of seismic response characteristics of typical engineering structures by using the strong-motion records from the structural response monitoring array in Beijing urban area; ⑤ Others, such as study on inversion of soil layer parameters and engineering structure parameters. In this paper, the preliminary results of the relevant research were introduced, and further exploratory analysis and study were conducted onthe above research issues, and the results show the rich information from the M5.1 Guye, Tangshan earthquake, and the potential contribution to the relevant research.
- M5.1 Guye, Tangshan earthquake /
- strong-motion record /
- instrumental seismic intensity /
- site condition /
- structural response monitoring array

HTML全文

图 1 唐山古冶5.1级地震中获得地震动记录的强震动台站和烈度台站分布^[4]

Figure 1. Distribution of strong-motion stations and intensity stations recording ground motions from the M5.1 Guye，Tangshan earthquake^[4]

下载: 全尺寸图片幻灯片

图 2 唐山古冶5.1级地震中获得结构反应记录的建筑结构地震反应观测台阵分布^[6]

Figure 2. Distribution of structural response monitoring arrays recording structural response motions from the M5.1 Guye，Tangshan earthquake^[6]

下载: 全尺寸图片幻灯片

图 3 唐山古冶5.1级地震中获得自由场地地震动记录的强震动台站分布

Figure 3. Distribution of free-field strong-motion stations recording ground motions from the M5.1 Guye，Tangshan earthquake

下载: 全尺寸图片幻灯片

图 4 唐山古冶5.1级地震的仪器地震烈度分布（中国地震台网中心报告，引自微信交流信息）

Figure 4. Distribution of instrumental seismic intensities from the M5.1 Guye，Tangshan earthquake（Report of China Earthquake Networks Center, cited from WeChat exchange of information）

下载: 全尺寸图片幻灯片

图 5 地震动PGA和PGV随震中距R_epi的衰减^[4]

Figure 5. Observed PGAs and PGVs attenuated with epicentral distance R_epi^[4]

下载: 全尺寸图片幻灯片

图 6 北京城区与两个基岩参考地区的水平向加速度反应谱谱比^[5]

Figure 6. Spectral ratio of horizontal spectral accelerations between Beijing urban area and two reference bedrock areas^[5]

下载: 全尺寸图片幻灯片

图 7 北京地区地震动观测与经验衰减关系计算反应谱值比较

Figure 7. Comparision of spectral accelerations of ground motions observed and calculated by empirical attenation relation

下载: 全尺寸图片幻灯片

表 1 比较分析用的地震动参数衰减关系系数

Table 1. Coefficient of the attenuation relation of ground motion parameters for comparative analysis

反应谱周期/s		C₁	C₂	C₃	C₄	C₅
0.04	长轴	2.048	0.674	–2.322	2.088	0.399
0.04	短轴	1.241	0.663	–2.010	0.944	0.447
0.10	长轴	2.456	0.640	–2.297	2.088	0.399
0.10	短轴	1.665	0.629	–1.988	0.944	0.447
0.50	长轴	1.358	0.776	–2.214	2.088	0.399
0.50	短轴	0.557	0.769	–1.919	0.944	0.447
1.00	长轴	0.226	0.895	–2.157	2.088	0.399
1.00	短轴	–0.599	0.895	–1.873	0.944	0.447
3.00	长轴	–1.106	0.959	–2.106	2.088	0.399
3.00	短轴	–1.854	0.938	–1.832	0.944	0.447
6.00	长轴	–2.361	1.036	2.067	2.088	0.399
6.00	短轴	–3.039	1.016	1.801	0.944	0.447

下载: 导出CSV

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