Seismic response of cracking features in Jubao Mountain during the aftershocks of Jiuzhaigou Ms7.0 earthquake
文献类型：期刊论文
| 作者 | Shen, Tong3; Wang, Yun-sheng3; Luo, Yong-hong3; Xin, Cong-cong3; Liu, Yong3; He, Jian-xian1,2 |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2019-11-01 |
| 卷号 | 16期号:11页码:2532-2547 |
| 关键词 | Jiuzhaigou Ms7 0 earthquake Aftershocks Directivity effects Slope dynamic response HVSR SSR |
| ISSN号 | 1672-6316 |
| DOI | 10.1007/s11629-019-5570-0 |
| 英文摘要 | Jiuzhaigou is a world-heritage site located in the plateau area of Northwest Sichuan Province, China. Serious slope failures in the epicentral area were triggered by the Ms7.0 Jiuzhaigou earthquake occurred on August 8, 2017. The source areas of the hazards are usually concentrated near ridge crests, revealing the possible occurrence of ground motion amplification phenomena. To explore the role of the amplification of ground motions in the formation of earthquake-triggered slope failures, two seismometers were installed, on the next day after the main shock, at the bottom of the slope of Jubao Mountain near the seismogenic fault. The two monitoring sites are located at elevations of 1414 m (J1) and 1551 m (J2, the top of the mountain). Five aftershocks were recorded by the monitoring instruments. We compared the mean levels of the peak ground acceleration (PGA) observed at different locations, and investigated the directional variations in the shaking energy by analyzing the polar diagrams of the Arias intensity (Ia). Then, in order to identify the directional resonance phenomenon and their frequencies and amplification coefficients, we examined the horizontal-to-vertical spectral ratio (HVSR) and the standard spectral ratio (SSR). Polar diagrams of the Arias intensity (Ia) indicated that the site response of Jubao Mountain showed a pronounced directivity (in the EW direction) with shaking maxima near the hill top oriented orthogonally to the elongation of the relief. We observed an obvious resonance phenomenon at site J2 at relatively low frequencies (2.5-9 Hz) and very weak spectral amplifications at site J1 at high frequencies (5-15 Hz), which suggested that the predominant frequency of monitoring site J2 was obviously attenuated and that the difference in the spectra was related to the influences of the local-scale site conditions of the whole mountain. The results of spectral ratio analyses (HVSR and SSR) showed that the direction of resonance was concentrated around an EW orientation, and the amplification factors near the hill top were larger than 2. It suggests that geologic factors also play a significant role in the anisotropic amplifications affecting the tops of slopes besides the topographic effects. |
| WOS关键词 | NUMERICAL-SIMULATION ; SPATIAL-DISTRIBUTION ; PACOIMA-CANYON ; GROUND MOTION ; AUGUST 2017 ; SITE ; AMPLIFICATION ; LANDSLIDES ; HILL ; TOPOGRAPHY |
| 资助项目 | National Natural Science Foundation of China[41877235] ; National Natural Science Foundation of China[1704243] ; Funds for Creative Research Groups of China[41521002] ; Independent Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection[SKLGP2015Z001] ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000495245200006 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Funds for Creative Research Groups of China ; Funds for Creative Research Groups of China ; Independent Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; Independent Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Funds for Creative Research Groups of China ; Funds for Creative Research Groups of China ; Independent Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; Independent Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Funds for Creative Research Groups of China ; Funds for Creative Research Groups of China ; Independent Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; Independent Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Funds for Creative Research Groups of China ; Funds for Creative Research Groups of China ; Independent Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; Independent Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/95722]  |
| 专题 | 地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室 |
| 通讯作者 | Wang, Yun-sheng |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Key Lab Shale Gas & Geoengn, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Chengdu Univ Technol, State Key Lab Geohazards Prevent & Geoenvironm, Chengdu 610059, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shen, Tong,Wang, Yun-sheng,Luo, Yong-hong,et al. Seismic response of cracking features in Jubao Mountain during the aftershocks of Jiuzhaigou Ms7.0 earthquake[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(11):2532-2547. |
| APA | Shen, Tong,Wang, Yun-sheng,Luo, Yong-hong,Xin, Cong-cong,Liu, Yong,&He, Jian-xian.(2019).Seismic response of cracking features in Jubao Mountain during the aftershocks of Jiuzhaigou Ms7.0 earthquake.JOURNAL OF MOUNTAIN SCIENCE,16(11),2532-2547. |
| MLA | Shen, Tong,et al."Seismic response of cracking features in Jubao Mountain during the aftershocks of Jiuzhaigou Ms7.0 earthquake".JOURNAL OF MOUNTAIN SCIENCE 16.11(2019):2532-2547. |
入库方式： OAI收割
来源：地质与地球物理研究所
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