芦山地震中强地面运动的区域性特征探讨
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摘要
本文分析了2013年4月20日Ms7.0芦山主震和余震的强震动记录,与美国NGA-West2数据以及地震动衰减关系对比,分析了地震动区域特征。研究结果表明,与美国加州地区中小震的强震动数据相比,芦山余震强震动记录的高频幅值较大,地震动影响有效范围较小;在地震动传播路径上芦山地区相比美国加州地区具有较慢的非弹性衰减特性(较高的Q值)。建议对我国地震动衰减关系构建时通常采用的映射法的合理性进行重新考虑。
Earthquake strong motions are dependent on region factors. We processed the strong motion data from Lushan earthquake sequences and compared with the database of NGA-West2. Compared with strong motion data of small-to-moderate earthquakes in Californian,Strong motion data from Lushan Earthquake has been proven that the amplitude in high frequency is higher and the effective distance is smaller. It also shows that ground motions from Lushan Earthquake have slower anelastic attenuation than those in California. It is suggested that the transform method in building Chinese ground motion attenuation relationship should be evaluated the regional dependence between two studies regions.
引文
[1]Douglas,J..An Investigation of Analysis of Variance as a Tool for Exploring Regional Differences in Strong Ground Motions[J],Journal of Seismology,2004a,8(4).485-496.
    [2]Douglas,J..Use of Analysis of Variance for the Investigation of Regional Dependence of Strong Ground Motions,Proceedings of the 13th World Conference on Earthquake Engineering,Vancouver,Canada,2004b,Paper No.29.
    [3]Boore,D.M.,J.P.Stewart,E.Seyhan,and G.Atkinson.NGA-West2 equations for predicting response spectral accelerations for shallow crustal earthquakes,PEER Report 2013/05.Berkeley,California:Pacific Earthquake Engineering Research Center.
    [4]Timothy D.Ancheta,Robert B.Darragh,Jonathan P.Stewart,Emel Seyhan,Walter J.Silva,Brian S.J.Chiou,Katie E.Wooddell,Robert W.Graves,Albert R.Kottke,David M.Boore,Tadahiro.PEER NGA-West2 Database,PEER Report 2013/05.Berkeley,California:Pacific Earthquake Engineering Research Center.
    [5]温瑞智,任叶飞,黄旭涛,等.芦山7.0级地震强震动记录及其震害相关性[J].地震工程与工程震动,2013,33(4):1-14.WEN Ruizhi,REN Yefei,HUANG Xutao,et al.Strong motion records and their engineering damage implications for Lushan Earthquake on April20,2013[J].Journal of Earthquake Engineering And Engineering Vibration,2013,33(4):1-14.(in Chinese)
    [6]王卫民,郝金来,姚振兴.2013年4月20日四川芦山地震震源破裂过程反演初步结果[J].地球物理学报,2013,56(4):1412-1417.WANG Weimin,HAO Jinlai,YAO Zhenxing.Preliminary result for rupture process of Apr.20,2013,Lushan earthquake,Sichuan,China[J].Chinese Journal of Geophysics,2013,33(4):1412-1417.(in Chinese)
    [7]张勇,许力生,陈运泰.芦山4.20地震破裂过程及其致灾特征初步分析[J].地球物理学报,2013,56(4):1408-1411.ZHANG Yong,XU Lisheng,CHEN Yuntai.Rupture process of the Lushan 4.20 earthquake and preliminary analysis on the disaster causing mechanism[J].Chinese Journal of Geophysics,2013,56(4):1408-1411.(in Chinese)
    [8]Wang,D.,L.L.Xie,N.A.Abrahamson,and S.Li(2010).Comparison of strong ground motion from the Wenchuan,China,earthquake of 12 May2008 with the Next Generation Attenuation(NGA)ground-motion models,Bull.Seismol.Soc.Am.100,no.5B,2381-2395.

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