利用宁洱地震强震记录分析场地响应
|
摘要
采用Nakamura方法,利用2007年6月3日宁洱地震强震动记录S波资料和脉动观测资料,计算了宁洱震区一些强震动台的场地响应。结果表明,当台站场地为基岩或覆盖层较薄时,由脉动数据和S波数据分别计算的谱比曲线一致性很好。当覆盖层大于35m的时候,两者的谱比值有差异,即用S波计算的场地放大响应要明显大于用脉动计算的场地响应。
In this paper,we calculate the strong motion site responses by the Nakamura method based on the pre-seismic microtremor and S wave data recorded during Ning'er earthquake on 3 June 2007.The site response spectra of microtremor and S wave are consistent in general for basement rock site or thin-overburden site.However,for thick-overburden site over 35 meters,both spectral ratio curves have obvious differences,which means that the site response spectra calculated by ground micro-tremor is much bigger than that calculated by S wave.
In this paper,we calculate the strong motion site responses by the Nakamura method based on the pre-seismic microtremor and S wave data recorded during Ning'er earthquake on 3 June 2007.The site response spectra of microtremor and S wave are consistent in general for basement rock site or thin-overburden site.However,for thick-overburden site over 35 meters,both spectral ratio curves have obvious differences,which means that the site response spectra calculated by ground micro-tremor is much bigger than that calculated by S wave.
引文
崔建文,李正光,赵云旭.2007年宁洱6.4级地震强震动观测记录[J].地震研究,30(4):384-388.
郭明珠,谢礼立,高尔根,等.1999.利用地脉动进行场地反应分析研究综述[J].世界地震工程,15(3):14-19.
郭明珠.2003.地脉动波场分析及其在场地动力特征测试中的应用[D].哈尔滨:中国地震局工程力学研究所.
刘丽芳,苏有锦,刘杰,等.2007.利用Moya方法反演云南数字地震台站场地响应[J].地震研究,30(1):39-42.
朱荣欢,苏有锦.2007.用H/V谱比法计算云南区域数字地震台站的场地响应[J].地震研究,30(3):248-252.
Boore D M,Joyner W.B,Fumal T E.1993.Estimation of responsespectra and peak accelerations from Western North American earth-quakes:an interimreport[R].U.S.Geol.Surv.Open-File Dept:93-509.
ChyiTyi Lee,Chin Tung Cheng,Chi-Wen Liao,et al.2001.Site Clas-sification of Taiwan Free-Field Strong-Motion Stations[J].BSSA,91(5):1283-1297.
Field E,Jacob K.1995.A comparison and test of various site-responseestimation techniques,including three that are not reference-site de-pendent[J].BSSA,85,1127-1143.
Hiroshi Arai,Kohji Tokimatsu.2004.S-Wave Velocity Profiling by Inver-sion of Microtremor H/V Spectrum[J].BSSA,94(1):53-63.
Lachet C,Bard P,et al.1996.Site effects and microzonation in the cityof thessaloniki(Greece)comparision of different approaches[J].BSSA,86:228-241.
Lermo J,Chavez-Garcia J.1993.Site effect evaluation using spectral ra-tions with only one station[J].BSSA,83:1574-1594.
Moya C A,Aguirre J,Irikura K.2000.Inversion of source parametersand site effects from strong ground motion records using genetic algo-rithms[J].BSSA,90(4):977-992.
Nakamura Y.1989.A method for dynamic characteristics estimation ofsubsurface using microtremor on the ground surface[J].Q.Rep.Railway Tech.Res.Inst,30:25-33.
Yamazaki,F,Ansary M A.1997.Horizontal-to-vertical spectrumratio ofearthquake ground motion for site characterization[J].EarthquakeEng.Struct.Dyn,26:671,689.
郭明珠,谢礼立,高尔根,等.1999.利用地脉动进行场地反应分析研究综述[J].世界地震工程,15(3):14-19.
郭明珠.2003.地脉动波场分析及其在场地动力特征测试中的应用[D].哈尔滨:中国地震局工程力学研究所.
刘丽芳,苏有锦,刘杰,等.2007.利用Moya方法反演云南数字地震台站场地响应[J].地震研究,30(1):39-42.
朱荣欢,苏有锦.2007.用H/V谱比法计算云南区域数字地震台站的场地响应[J].地震研究,30(3):248-252.
Boore D M,Joyner W.B,Fumal T E.1993.Estimation of responsespectra and peak accelerations from Western North American earth-quakes:an interimreport[R].U.S.Geol.Surv.Open-File Dept:93-509.
ChyiTyi Lee,Chin Tung Cheng,Chi-Wen Liao,et al.2001.Site Clas-sification of Taiwan Free-Field Strong-Motion Stations[J].BSSA,91(5):1283-1297.
Field E,Jacob K.1995.A comparison and test of various site-responseestimation techniques,including three that are not reference-site de-pendent[J].BSSA,85,1127-1143.
Hiroshi Arai,Kohji Tokimatsu.2004.S-Wave Velocity Profiling by Inver-sion of Microtremor H/V Spectrum[J].BSSA,94(1):53-63.
Lachet C,Bard P,et al.1996.Site effects and microzonation in the cityof thessaloniki(Greece)comparision of different approaches[J].BSSA,86:228-241.
Lermo J,Chavez-Garcia J.1993.Site effect evaluation using spectral ra-tions with only one station[J].BSSA,83:1574-1594.
Moya C A,Aguirre J,Irikura K.2000.Inversion of source parametersand site effects from strong ground motion records using genetic algo-rithms[J].BSSA,90(4):977-992.
Nakamura Y.1989.A method for dynamic characteristics estimation ofsubsurface using microtremor on the ground surface[J].Q.Rep.Railway Tech.Res.Inst,30:25-33.
Yamazaki,F,Ansary M A.1997.Horizontal-to-vertical spectrumratio ofearthquake ground motion for site characterization[J].EarthquakeEng.Struct.Dyn,26:671,689.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心