[1]冯 卓a,王运生b*,吴昊宸a,等.芦山MS 6~1级地震石棉县城谷坡动力响应特征[J].山地学报,2023,(1):93-102.[doi:10.16089/j.cnki.1008-2786.000733]
　FENG Zhuoa,WANG Yunshengb*,WU Haochena,et al.Dynamic Response of the Valley Slopes to 2022 MS 6.1 Earthquake in Shimian County of Lushan, Sichuan, China[J].Mountain Research,2023,(1):93-102.[doi:10.16089/j.cnki.1008-2786.000733]
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芦山MS 6~1级地震石棉县城谷坡动力响应特征
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2023年第1期
页码:
93-102
栏目:
山地灾害
出版日期:
2023-01-20

文章信息/Info

Title:
Dynamic Response of the Valley Slopes to 2022 MS 6.1 Earthquake in Shimian County of Lushan, Sichuan, China
文章编号:
1008-2786-(2023)1-93-10
作者:
冯 卓a; 王运生b*; 吴昊宸a; 唐 涛a; 刘世成a
(成都理工大学a. 环境与土木工程学院; b. 地质灾害防治与地质环境保护国家重点实验室, 成都 610059)
Author(s):
FENG Zhuoa; WANG Yunshengb*; WU Haochena; TANG Taoa; LIU Shichenga
(a. College of Environment and Civil Engineering; b. State Key Laboratory of Geo-Hazard Prevention and Geo-Environment Protection, Chengdu University of Technology, Chengdu 610059, China)
关键词:
芦山MS 6.1级地震;  石棉县城谷坡;  实测地震数据;  地震动响应;  放大效应
Keywords:
observed seismic wave data;  dynamic response;  amplification effect;  Lushan MS 6.1 earthquake;  Shimian county
分类号:
P642.27
DOI:
10.16089/j.cnki.1008-2786.000733
文献标志码:
C
摘要:
在揭示山体不同部位和不同场地条件对斜坡地震动响应程度的研究中,学者们多采用振动台和建模等方法,较少使用天然地震下记录到的地震波数据进行研究分析。本研究以2022年芦山MS 6.1级地震为对象,分析了布置于石棉县的强震监测仪所记录到的主震数据,采用小波变换方法分析了山体部位、高程、场地条件等因素对斜坡地震动力响应峰值加速度和Arisa强度的影响,明确了地震时频演变规律。研究结果表明:(1)坡折处水平向放大效应更加明显;(2)南桠河左岸坡体卓越频率为6～10 Hz,右岸为5～12 Hz;(3)深厚风化层场地相较于基岩场地具有更显著的放大效应;(4)S波到达地面时会分异成不同频值,其主频值分别为8.50 Hz和 4.20 Hz附近。研究结果可为地震区类似斜坡变形破坏模式和稳定性研究提供参考。
Abstract:
In the study of revealing the response level of slope ground motion at different parts of a mountain and different site conditions, scholars mostly used vibration platform and modeling methods, and seldom used seismic wave data recorded under natural earthquakes for research purpose.In this study, the shock data auto-recorded by strong earthquake monitors installed in Shimian county of Lushan, Sichuan, China were analyzed for analytical interpretation of an earthquake with magnitude 6.1, striking Lushan, Sichuan, China in 2022. It analyzed the influence of mountain position, elevation, site conditions and other factors on the peak acceleration and Arisa intensity of slope seismic dynamic response by wavelet transform method, and the evolution law of seismic time frequency was clarified.Results includes four points:(1)The horizontal magnification effect was more obvious at slope break.(2)The predominant frequency of the slope on the left bank of the Nanya River was 6～10 Hz, and the right bank was 5～12 Hz.(3)A more significant amplification effect was found in the deep weathered layer site than in the bedrock site.(4)When the S wave reached to ground, it branched off into different frequency values, and its main frequency values were around 8.50 Hz and 4.20 Hz, respectively. The research results can provide reference for the study of slope failures in earthquake area, particularly for the study of ground motion response incurred by shocks.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2022-09-30; 改回日期(Accepted date):2022-12-23
基金项目(Foundation item): 国家自然科学基金(41877235); 国家重点研发计划项目(2017YFC1501000); 国家创新研究群体科学基金(41521002); 地质灾害防治与地质环境保护国家重点实验室自主课题基金(SKLGP2015Z001)。[National Natural Science Foundation of China(41877235), The National Key Research and Development Program of China(2017YFC1501000), The Funds for Creative Research Groups of China(41521002)and The Independent Fund of State Key Laboratory of Geohazard Prevention, Geoenvironment Protection(SKLGP2015Z001)]
作者简介(Biography): 冯卓(1997-),男,硕士研究生,主要研究方向:工程地质和地质灾害。[FENG Zhuo(1997-), male, M. Sc. candidate, research on geological engineering] E-mail:997106813@qq.com
*通讯作者(Corresponding author): 王运生(1960-),男,博士,教授,主要研究方向:工程地质力学。[WANG Yunsheng(1960-), male, doctor, professor,research on engineering geology] E-mail:wangys60@163.com

更新日期/Last Update: 2023-01-30