| 2016年8月24日意大利佩鲁贾M_W 6.2地震动特性 |
| |
| 引用本文： | 孙健,胡进军.2016年8月24日意大利佩鲁贾M_W 6.2地震动特性[J].地震地磁观测与研究,2017,38(6):57-63. |
| |
| 作者姓名： | 孙健 胡进军 |
| |
| 作者单位： | 中国哈尔滨 150080 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 |
| |
| 基金项目： | 中国地震局工程力学研究所基本科研业务专项（项目编号：2014B06，2016A01）；国家自然科学基金（项目编号：51578516，51238012） |
| |
| 摘 要： | 2016年8月24日在意大利佩鲁贾地区发生M_W 6.2地震,截至北京时间2016年8月25日8时,共获得强震记录192组,分析地震动PGA、反应谱以及能量参数的衰减特征。研究结果表明:(1)峰值。此次地震PGA100 cm/s~2记录的水平平均反应谱在短周期明显大于欧洲的设计谱。两水平方向平均反应谱谱比小于1.5,并且在短周期(T0.5 s)谱比差值变化较大,说明此次地震EW向地震动对短周期结构物影响较大;(2)衰减特性。整体看来,此次地震中的PGA值均不同程度低于中国第五代区划图中的中强地震区、中国西部地区、美国西部地区以及欧洲中小地震衰减模型的预测值,且衰减快。Arias强度的衰减变化趋势与Travasarou等的理论模型基本一致,但均小于理论模型值;(3)持时。此次地震的相对持时随震中距增大有逐渐增大趋势,持时均大于Kempton及McQuire的理论模型,表明此次地震的能量释放时间较长。此次意大利地震的地震动参数特征研究表明,该地震具有能量衰减快、持续时间长、对短周期结构物影响较大等特点,验证了此次地震破坏集中在近场、远场震害相对较轻的结论,这也是造成本次地震灾害严重的主要原因。
|
| 关 键 词： | 意大利佩鲁贾地震 地震动 反应谱 PGA 持时 |
Characteristics of Strong Ground Motion of the Perugia Earthquake,in Italy on August 24, 2016 |
| |
| Sun Jian,Hu Jinjun.Characteristics of Strong Ground Motion of the Perugia Earthquake,in Italy on August 24, 2016[J].Seismological and Geomagnetic Observation and Research,2017,38(6):57-63. |
| |
| Authors: | Sun Jian Hu Jinjun |
| |
| Institution: | Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China |
| |
| Abstract: | An MW 6.2 earthquake occurred in Perugia, in Italy on August 24, 2016. Up to the 8 a.m of Beijing on August 25, 2016, the Italy earthquake department received a total of 192 sets of strong motion records. Based on these processed record, we study the characteristics of response spectrum, PGA and the energy attenuation of the earthquake. The results show that: In terms of peak ground acceleration, the horizontal average response spectrum of the recorded PGA greater than 100 cm/s2 in the earthquake is significantly greater than the European design spectrum in the short period, and the average response spectrum ratio is less than 1.5, and in the short period (T<0.5 s), the difference of the ratio is larger, so it shows that the east-west direction of the ground motion has a great influence on the short period structure; In terms of the attenuation characteristics, overall, PGA values of the earthquake are lower than the predicted values of the moderate earthquake area of the fifth generation of China, the western region of China, the western region of the United States and Europe, and fast decay; the attenuation trend of the model of Arias intensity of the earthquake and the theoretical model proposed by Travasarou are basically the same, but the values of Arias intensity of the earthquake are less than the theoretical model; In terms of the duration, the duration of the earthquake with distance increase is gradually increasing, and it is higher than the theoretical model of Kempton and McQuire, indicating that the energy release time of the earthquake is longer. Through the study of the characteristics of the ground motion parameters, we know that the earthquake has the characteristics of fast energy attenuation, long duration and great influence on short period structures, and the results show that the seismic damage is concentrated in the near field, but the far field earthquake damage is relatively light, and this conclusion is also the main cause of serious disasters in the earthquake. |
| |
| Keywords: | Perugia earthquake strong ground motion the response spectrum PGA duration |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《地震地磁观测与研究》浏览原始摘要信息 |
| 点击此处可从《地震地磁观测与研究》下载免费的PDF全文 |
|
