岷县漳县6.6级地震及余震强震动记录特征分析
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摘要
对2013年7月22日甘肃岷县—漳县地震获取的273条主余震加速度记录进行格式转换、基线校正和滤波等常规处理,分析该地震主震(M_S6.6)和余震(M_S5.6)两次地震记录的幅值、持时以及反应谱特征,发现M_S6.6主震记录的PGA范围在0.728～177.5 gal间,M_S5.6余震记录的PGA范围在0.732～69.3 gal间;将观测数据与霍俊荣和第五代《中国地震动参数区划图》地震动衰减关系进行对比,发现霍俊荣衰减关系更吻合于此次地震的主余震加速度衰减;绘制主余震5%～95%重要持时分布图,并针对主震62MXT反应谱和本地设计谱以及近些年国内主要强震震中反应谱开展比较分析;最后研究土层台、基岩台、相同台站各个震级反应谱的特征。
On July 22, 2013, an M_S6.6 earthquake and its aftershock occurred at the border area between Minxian and Zhangxian Counties, Gansu Province. In this study, 273 items of acceleration records from the M_S6.6 mainshock and the M_S5.6 aftershock were processed, and the characteristics of the amplitudes, response spectra, and duration of the records were compared. The peak ground acceleration range of the main earthquake was 0.728-177.5 gal, and that of the aftershock was 0.732-69.3 gal. According to the comparison among observation data, the attenuation relationship of Huo Junrong, and the ground motion attenuation relationship in the fifth Chinese seismic zonation map, it was found that the attenuation relationship of Huo Junrong is more suitable for the acceleration attenuation of the two earthquakes; the 5%-95% significant duration distribution of the two earthquakes was calculated and plotted. The response spectrum of the main earthquake at 62 MXT was compared with the design spectrum and the response spectra of major strong earthquakes in China in recent years. Finally, the response spectrum characteristics of typical soil stations, bedrock stations, and the same station with different magnitudes were analyzed.
On July 22, 2013, an M_S6.6 earthquake and its aftershock occurred at the border area between Minxian and Zhangxian Counties, Gansu Province. In this study, 273 items of acceleration records from the M_S6.6 mainshock and the M_S5.6 aftershock were processed, and the characteristics of the amplitudes, response spectra, and duration of the records were compared. The peak ground acceleration range of the main earthquake was 0.728-177.5 gal, and that of the aftershock was 0.732-69.3 gal. According to the comparison among observation data, the attenuation relationship of Huo Junrong, and the ground motion attenuation relationship in the fifth Chinese seismic zonation map, it was found that the attenuation relationship of Huo Junrong is more suitable for the acceleration attenuation of the two earthquakes; the 5%-95% significant duration distribution of the two earthquakes was calculated and plotted. The response spectrum of the main earthquake at 62 MXT was compared with the design spectrum and the response spectra of major strong earthquakes in China in recent years. Finally, the response spectrum characteristics of typical soil stations, bedrock stations, and the same station with different magnitudes were analyzed.
引文
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[14] 徐钦,古云鹤,孙艳萍,等.四川九寨沟7.0级地震强震动记录及特征分析[J].地震工程学报,2018,40(4):769-777.XU Qin,GU Yunhe,SUN Yanping,et al.Strong Ground Motion Records and Its Characteristics in Jiuzhaigou MS7.0 Earthquake on August 8,2017[J].China Earthquake Engineering Journal,2018,40(4):769-777.
[15] 孙艳萍,陈文凯,张苏平,等.基于居民点密度的人口空间化及在四川九寨沟7.0级地震中的应用[J].地震工程学报,2018,40(增刊1):174-179.SUN Yanping,CHEN Wenkai,ZHANG Suping,et al.Population Spatialization Research Based on Settlements Density and Its Application in Jiuzhaigou,Sichuan MS7.0 Earthquake[J].China Earthquake Engineering Journal,2018,40(Supp1):174-179.
[2] 袁道阳,杨青云,雷中生,等.四川北部地区三次中强历史地震补充考证[J].地震工程学报,2016,38(2):226-235.YUAN Daoyang,YANG Qingyun,LEI Zhongsheng,et al.Additional Textual Criticism of Three Moderate-Strong Historical Earthquakes in the Northern Region of Sichuan Province[J].China Earthquake Engineering Journal,2016,38(2):226-235.
[3] 田秀丰,李佐唐,徐钦,等.甘肃岷县漳县6.6级地震强震动观测记录与初步分析[J].地震工程学报,2013,35(3):497-502.TIAN Xiufeng,LI Zuotang,XU Qin,et al.The Strong Motion Records and Preliminary Analysis for Minxian—Zhangxian M6.6 Earthquake in Gansu Province[J].China Earthquake Engineering Journal,2013,35(3):497-502.
[4] 黄旭涛,温瑞智,任叶飞,等.2013年7月22日岷县漳县6.6级地震强震记录及特征分析[J].地震工程学报,2013,35(3):489-496.HUANG Xutao,WEN Ruizhi,REN Yefei,et al.Strong Mmotion Records and Its Characteristics in Minxian—Zhangxian MS6.6 Earthquake on July 22,2013[J].China Earthquake Engineering Journal,2013,35(3):489-496.
[5] 于海英,王栋,杨永强,等.汶川8.0级地震强震动加速度记录的初步分析[J].地震工程与工程振动,2009,29(1):1-13.YU Haiying,WANG Dong,YANG Yongqiang,et al.The Preliminary Analysis of Strong Ground Motion Records from the MS8.0 Wenchuan Earthquake[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(1):1-13.
[6] 徐钦,田秀丰,王维欢,等.2013年甘肃岷县—漳县6.6级地震仪器烈度与宏观调查烈度比较分析[J].地震工程学报,2018,40(1):124-129.XU Qin,TIAN Xiufeng,WANG Weihuan,et al.A Comparison and Analysis of Instrumental Intensity and Macroseismic Survey Intensity of the 2013 Minxian—Zhangxian MS6.6 Earthquake in Gansu Province[J].China Earthquake Engineering Journal,2018,40(1):124-129.
[7] 霍俊荣.近场强地面运动衰减规律的研究[D].哈尔滨:国家地震局工程力学研究所,1989.HUO Junrong.Study on the Attenuation Law of Near Field Ground Motion[D].Harbin:Institute of Engineering Mechanics,State Seismological Bureau,1989.
[8] 俞言祥,李山有,肖亮,等.为新区划图编制所建立的地震动衰减关系[J].震灾防御技术,2013,8(1):24-33.YU Yanxiang,LI Shanyou,XIAO Liang,et al.Development of Ground Motion Attenuation Relations for the New Seismic Hazard Map of China[J].Technology for Earthqu ake Disaster Preventior,2013,8(1):24-33.
[8] 俞言祥,李山有,肖亮,等.为新区划图编制所建立的地震动衰减关系[J].震灾防御技术,2013,8(1):24-33.YU Yanxiang,LI Shanyou,XIAO Liang,et al.Development of Ground Motion Attenuation Relations for the New Seismic Hazard Map of China[J].Technology for Earthquake Disaster Prevention,2013,8(1):24-33.
[9] TRIFUNANC M D,BRADY A G.A Study on Duration of Strong Earthquake Ground Motion[J]..Bull Seism SocAmer,1975,65(3):581-626.
[10] 金星,康兰池,欧益萍.福建地区中小地震加速度反应谱衰减规律[J].地震工程与工程振动,2009,29(5):52-58.JIN Xing,KANG Lanchi,OU Yiping.Acceleration Spectrum Attenuation Relation for Small and Moderate Earthquakes in Fujian Region[J].Earthquake Engineering and Engineering Vibration,2009,29(5):52-58.
[11] 建筑抗震设计规范:GB50011-2010[S].北京:中国建筑工业出版社,2010.Code for Seismic Design of Buildings:GB50011-2010[S].Beijing:China Architecture and Building Press,2010.
[12] 张苏平,聂高众,孙艳萍,等.甘肃岷县漳县MS6.6地震重灾区房屋类型与致死的关系研究[J].地震工程学报,2017,39(4):781-789.ZHANG Suping,NIE Gaozhong,SUN Yanping,et al.Relation between Different Building Types and Personnel Death in the Heavy Disaster Area of the Minxian—Zhangxian MS6.6 Earthquake[J].China Earthquake Engineering Journal,2017,39(4):781-789.
[13] 王兰民,吴志坚.岷县漳县6.6级地震震害特征及其启示[J].地震工程学报,2013,35(3):401-412.WANG Lanmin,WU Zhijian.Earthquake Damage Characteristics of the Minxian—Zhangxian MS6.6 Earthquake and Its Lessons[J].China Earthquake Engineering Journal,2013,35(3):401-412.
[14] 徐钦,古云鹤,孙艳萍,等.四川九寨沟7.0级地震强震动记录及特征分析[J].地震工程学报,2018,40(4):769-777.XU Qin,GU Yunhe,SUN Yanping,et al.Strong Ground Motion Records and Its Characteristics in Jiuzhaigou MS7.0 Earthquake on August 8,2017[J].China Earthquake Engineering Journal,2018,40(4):769-777.
[15] 孙艳萍,陈文凯,张苏平,等.基于居民点密度的人口空间化及在四川九寨沟7.0级地震中的应用[J].地震工程学报,2018,40(增刊1):174-179.SUN Yanping,CHEN Wenkai,ZHANG Suping,et al.Population Spatialization Research Based on Settlements Density and Its Application in Jiuzhaigou,Sichuan MS7.0 Earthquake[J].China Earthquake Engineering Journal,2018,40(Supp1):174-179.