近断层强震记录基线校正及不确定性分析
|
摘要
采用汶川地震近断层强震记录,分析了近断层记录基线校正的原则、不同基线校正方法的特点以及基线校正的不确定性因素。根据基线校正原则提出了基线校正的一般步骤,对比分析了在合理分界时间点范围内选择不同组时间分界点进行基线校正后各组记录之间的地震动参数和反应谱特性。结果表明,已有的各种基线校正方法并不能较好地得到准确的确定性基线校正结果,满足基线校正的一般原则也会得到不同的校正结果,但是合理地进行基线校正后,对加速度和速度时程相关的地震动参数和不同形式的反应谱特性的影响很小。
The principle,characteristics of different methods and indeterminate factors of baseline correction(BC) for near-fault strong motion records are analyzed using the near-fault records of Wenchuan earthquake.The general procedure for BC is put forward according to the principles,and the BC for records is conducted through choosing different groups of time points in the rational scope of time dividing points.The ground motion parameters and the response spectra of different corrected records are comparatively analyzed.The results show that the accurate determinate results could not be obtained by using current methods,and in spite of the principles for BC are satisfied,different results may also be obtained.However,through the rational BC,there are small effects on the analyzed results of the ground motion parameters related to acceleration,velocity and the response spectrum.
The principle,characteristics of different methods and indeterminate factors of baseline correction(BC) for near-fault strong motion records are analyzed using the near-fault records of Wenchuan earthquake.The general procedure for BC is put forward according to the principles,and the BC for records is conducted through choosing different groups of time points in the rational scope of time dividing points.The ground motion parameters and the response spectra of different corrected records are comparatively analyzed.The results show that the accurate determinate results could not be obtained by using current methods,and in spite of the principles for BC are satisfied,different results may also be obtained.However,through the rational BC,there are small effects on the analyzed results of the ground motion parameters related to acceleration,velocity and the response spectrum.
引文
[1]Boore D M.Effect of baseline corrections on displacements and response spectra for several recordings of the 1999 Chi-Chi,Taiwan,Earthquake[J].Bulletin of the Seismological Society of America,2001,91(5):1199-1211.
[2]王国权,周锡元.921台湾集集地震近断层强震记录的基线校正[J].地震地质,2004,26(1):1-14.WANG Guoquan,ZHOUXiyuan.Baseline correction of near fault ground motion recordings of the 1999 Chi-Chi,Taiwan Earthquake[J].Seis-mology and Geology,2004,26(1):1-14.
[3]Graizer V M.Effect of tilt on strong motion data processing[J].Soil Dynamics and Earthquake Engineering,2005,25(3):197-204.
[4]于海英,江汶乡,解全才,等.近场数字强震仪记录误差分析与零线校正方法[J].地震工程与工程振动,2009,29(6):1-12.YUHaiying,JIANG Wenxiang,XIE Quancai,et al.Baseline correction of digital strong-motion records in near-field[J].Journal of EarthquakeEngineering and Engineering Vibration,2009,29(6):1-12.
[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.YUHaiying,WANG Dong,YANG Yongqiang,et al.The preliminary analysis of strong ground motion records from theMs8.0 Wenchuan Earth-quake[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(1):1-13.
[6]国家重大科学工程“中国地壳运动观测网络”项目组.GPS测定的2008年汶川Ms8.0级地震的同震位移场[J].中国科学(D辑:地球科学).2008,38(10):1195-1206.State Major Science Project(The crustal motion observation network of China)Group.Co-seismic displacement field measured by GPS for 2008Wenchuan Ms8.0 Earthquake[J].Science in China(Ser.D:Earthquake Science),2008,38(10):1195-1206.
[7]Iwan W D,Moser MA,Peng C.Some observations on strong-motion earthquake measurement using a digital accelerograph[J].Bulletin of theSeismological Society of America,1985,75(5):1225-1246.
[8]陈勇,陈鲲,俞言祥.用集集主震记录研究近断层强震记录的基线校正方法[J].地震工程与工程振动,2007,27(4):1-7.CHEN Yong,CHENKun,YUYanxiang.Baseline correction method for near-fault accelerograms using Chi-Chi main shock record[J].Journal ofEarthquake Engineering and Engineering Vibration,2007,27(4):1-7.
[9]Wu Y,Wu C.Approximate recovery of coseismic deformation from Taiwan strong-motion records[J].Journal of Seismological,2007,11:159-170.
[10]Akkar S,Boore D M.On baseline corrections and uncertainty in response spectra for baseline variations commonly encountered in digital accelero-graph records[J].Bulletin of the Seismological Society of America,2009,99(3):1671-1690.
[2]王国权,周锡元.921台湾集集地震近断层强震记录的基线校正[J].地震地质,2004,26(1):1-14.WANG Guoquan,ZHOUXiyuan.Baseline correction of near fault ground motion recordings of the 1999 Chi-Chi,Taiwan Earthquake[J].Seis-mology and Geology,2004,26(1):1-14.
[3]Graizer V M.Effect of tilt on strong motion data processing[J].Soil Dynamics and Earthquake Engineering,2005,25(3):197-204.
[4]于海英,江汶乡,解全才,等.近场数字强震仪记录误差分析与零线校正方法[J].地震工程与工程振动,2009,29(6):1-12.YUHaiying,JIANG Wenxiang,XIE Quancai,et al.Baseline correction of digital strong-motion records in near-field[J].Journal of EarthquakeEngineering and Engineering Vibration,2009,29(6):1-12.
[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.YUHaiying,WANG Dong,YANG Yongqiang,et al.The preliminary analysis of strong ground motion records from theMs8.0 Wenchuan Earth-quake[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(1):1-13.
[6]国家重大科学工程“中国地壳运动观测网络”项目组.GPS测定的2008年汶川Ms8.0级地震的同震位移场[J].中国科学(D辑:地球科学).2008,38(10):1195-1206.State Major Science Project(The crustal motion observation network of China)Group.Co-seismic displacement field measured by GPS for 2008Wenchuan Ms8.0 Earthquake[J].Science in China(Ser.D:Earthquake Science),2008,38(10):1195-1206.
[7]Iwan W D,Moser MA,Peng C.Some observations on strong-motion earthquake measurement using a digital accelerograph[J].Bulletin of theSeismological Society of America,1985,75(5):1225-1246.
[8]陈勇,陈鲲,俞言祥.用集集主震记录研究近断层强震记录的基线校正方法[J].地震工程与工程振动,2007,27(4):1-7.CHEN Yong,CHENKun,YUYanxiang.Baseline correction method for near-fault accelerograms using Chi-Chi main shock record[J].Journal ofEarthquake Engineering and Engineering Vibration,2007,27(4):1-7.
[9]Wu Y,Wu C.Approximate recovery of coseismic deformation from Taiwan strong-motion records[J].Journal of Seismological,2007,11:159-170.
[10]Akkar S,Boore D M.On baseline corrections and uncertainty in response spectra for baseline variations commonly encountered in digital accelero-graph records[J].Bulletin of the Seismological Society of America,2009,99(3):1671-1690.
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