强震动加速度记录基线校正问题探讨
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摘要
针对汶川Ms8.0地震中3个典型的加速度基线漂移特性,分别采用基线初始化法、Iwan法及低频滤波法进行了基线校正。通过校正,基本消除了加速度记录中的低频噪音干扰,使基线大致回到了零线。通过实例分析了3种校正方法存在的问题。
The sources of some primary low frequency noise effecting on strong motion acceleration are analyzed.To remove the noise,three schemes of baseline correction are introduced,and the effect of the schemes on the velocity and displacement time series integrated the processed acceleration is pointed out.Apply the schemes,three typical accelerations of Wenchuan Ms8.0 earthquake are corrected,and some questions are also put forward for the consideration of baseline correction.
The sources of some primary low frequency noise effecting on strong motion acceleration are analyzed.To remove the noise,three schemes of baseline correction are introduced,and the effect of the schemes on the velocity and displacement time series integrated the processed acceleration is pointed out.Apply the schemes,three typical accelerations of Wenchuan Ms8.0 earthquake are corrected,and some questions are also put forward for the consideration of baseline correction.
引文
1谢礼立,于双久.强震观测与分析原理[M].北京:地震出版社,1982.(Xie Lili and Yu Shuangjiu.Strong motion ob-servation and analysis theory[M].Beijing:SeismologicalPress,1982)
2 David M Boore and Julian J Bommerb.Processing of strong-motion accelerograms:needs,options and consequences[J].Soil Dynamics and Earthquake Engineering,2005,25:93-115.
3 Boore D M.Effect of baseline corrections on response spectrafor two Recordings of the 1999 Chi-Chi,Taiwan,earthquake[R].USA Geological Survey,1999.
4 David M,et al.Comments on baseline correction of digitalstrong-motion data:examples from the 1999 Hector Mine,California,Earthquake[J].Bulletin of the Seismological So-ciety of America,2002,92(4):1 543-1 560.
5 Sinan Akkar and David M Boore.On baseline correctionsand uncertainty in response spectra for baseline variationscommonly encountered in digital accelerograph records[J].Bulletin of the Seismological Society of America,2009,99(3):1 671-1 690.
6 Iwan D,et al.Strong motion earthquake measurement using adigital accelerograph[R].The National Science Foundation,1984.
7 Vladimir M and Graizer.Effect of tilt on strong motion dataprocessing[J].Soil Dynamics and Earthquake Engineering,2005,25:197-204.
8 Converse A M.BAP:Basic strong-motion accelerogram pro-cessing software,version 1.0,U.S.Geol.Surv.Open-FileRept.[R].92-296.
9 David M Boore.On pads and filters:processing strong-mo-tion data[J].Bulletin of the Seismological Society of Ameri-ca,2005,95(2):745-750.
10 Guergana Mollova.Effects of digital filtering in data pro-cessing of seismic acceleration records[R].Hindawi Pub-lishing Corporation EURASIP Journal on Advances in Sig-nal Processing,2007.
2 David M Boore and Julian J Bommerb.Processing of strong-motion accelerograms:needs,options and consequences[J].Soil Dynamics and Earthquake Engineering,2005,25:93-115.
3 Boore D M.Effect of baseline corrections on response spectrafor two Recordings of the 1999 Chi-Chi,Taiwan,earthquake[R].USA Geological Survey,1999.
4 David M,et al.Comments on baseline correction of digitalstrong-motion data:examples from the 1999 Hector Mine,California,Earthquake[J].Bulletin of the Seismological So-ciety of America,2002,92(4):1 543-1 560.
5 Sinan Akkar and David M Boore.On baseline correctionsand uncertainty in response spectra for baseline variationscommonly encountered in digital accelerograph records[J].Bulletin of the Seismological Society of America,2009,99(3):1 671-1 690.
6 Iwan D,et al.Strong motion earthquake measurement using adigital accelerograph[R].The National Science Foundation,1984.
7 Vladimir M and Graizer.Effect of tilt on strong motion dataprocessing[J].Soil Dynamics and Earthquake Engineering,2005,25:197-204.
8 Converse A M.BAP:Basic strong-motion accelerogram pro-cessing software,version 1.0,U.S.Geol.Surv.Open-FileRept.[R].92-296.
9 David M Boore.On pads and filters:processing strong-mo-tion data[J].Bulletin of the Seismological Society of Ameri-ca,2005,95(2):745-750.
10 Guergana Mollova.Effects of digital filtering in data pro-cessing of seismic acceleration records[R].Hindawi Pub-lishing Corporation EURASIP Journal on Advances in Sig-nal Processing,2007.
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