| 四川九寨沟MS7.0地震的地震动分布和衰减特征初步分析 |
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| 引用本文： | 胡进军,孙健,刘琎.四川九寨沟MS7.0地震的地震动分布和衰减特征初步分析[J].震灾防御技术,2017,12(4):797-802. |
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| 作者姓名： | 胡进军 孙健 刘琎 |
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| 作者单位： | 中国地震局工程力学研究所, 地震工程与工程振动重点实验室, 哈尔滨 150080 |
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| 基金项目： | 国家自然科学基金资助项目（51578516，51238012）；中国地震局工程力学研究所基本科研业务专项资助项目（2016A01，2016A04） |
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| 摘 要： | 2017年8月8日在四川阿坝州九寨沟县发生了MS 7.0地震，这是继2008年四川汶川MS 8.0地震和四川芦山MS 7.0地震后在此地区发生的又一强震。本研究对此次地震中的66组主震记录进行了常规校正处理，基于此分析了此次地震中典型台站——九寨百合台站的地震动特征，并通过地震动的峰值加速度、反应谱参数分析了近场效应特征。研究结果表明:九寨百合台站的三分量峰值加速度都超过了100 gal，而地震动持时相对较短，并且三分量反应谱在短周期大于Ⅷ度多遇地震设计谱，小于Ⅷ度罕遇地震设计谱；由于九寨沟地震属于典型的走滑型地震，因此地震动参数的方向性特征不明显；九寨沟地震的地震动的峰值加速度以及反应谱谱值小于同等震级的芦山地震，并且小于几个典型衰减关系的预测值。对九寨沟地震的地震动参数特征研究表明，此次地震是一次震级较大、但灾害损毁程度较低的地震。
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| 关 键 词： | 四川九寨沟地震 地震动分布场 近场效应 峰值加速度 反应谱 |
| 收稿时间： | 2017/9/12 0:00:00 |
Preliminary Analysis of Distribution Characteristics of Ground Motion and Attenuation Relation of the Jiuzhaigou MS7.0 Earthquake on August 24, 2016, Sichuan, China |
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| Hu Jinjun,Sun Jian and Liu Jin.Preliminary Analysis of Distribution Characteristics of Ground Motion and Attenuation Relation of the Jiuzhaigou MS7.0 Earthquake on August 24, 2016, Sichuan, China[J].Technology for Earthquake Disaster Prevention,2017,12(4):797-802. |
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| Authors: | Hu Jinjun Sun Jian and Liu Jin |
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| Institution: | Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China |
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| Abstract: | On August 8, 2017, an MS7.0 earthquake hit Aba County, Jiuzhaigou of Sichuan Province. This is the second strong earthquake occurred in this area after the Wenchuan MS8.0 earthquake in 2008 and the Lushan MS7.0 earthquake in 2013 in Sichuan. After conventional correction of the 66 sets of mainshock records, we analyzed the characteristics of the typical station, Jiuzhai Baihe, the peak ground acceleration, the response spectrum and the near-field effect of the ground motion. The results show that the peak ground acceleration of three components of Jiuzhai Baihe stations great than 100 gal, but the duration is relatively short. The response spectrum of the three components is greater than Ⅷ degree frequent seismic design spectra, less than Ⅷ degree rare earthquake design spectrum in the short period. Since the Jiuzhaigou earthquake is a typical strike-slip earthquake, the distribution of the ground motion has smaller directional characteristics. The peak ground acceleration and the response spectrum of the Jiuzhaigou earthquake is smaller than the Lushan earthquake, as well as smaller than the predicted value of several typical attenuation relationship. The characteristics of the ground motion parameters of the Jiuzhaigou earthquake show that the earthquake is the one with large magnitude and low damage degree. |
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| Keywords: | Jiuzhaigou earthquake Distribution field of ground motion Near-field effect Peak ground acceleration Response spectrum |
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