基于强震数据的场地反应项分析及地震动参数预测
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摘要
场地反应项是描述场地地震反应特征的定量指标,也是标识场地自身频谱特性的特征量。选取新西兰南岛Canterbury地区20个地震台站,搜集2010～2012年14次强震记录210条,借鉴现有的基于单台地震数据的地震动残差分析方法及FA2010和BA2008两个地震动预测方程,研究选取台站的场地反应项曲线(δS2S_s值)。结果显示δS2S_s值与场地条件及沉积土层特性相关,与选取的地震动预测方程基本无关;δS2S_s值越大场地对地震动的放大效应越明显;反之,δS2S_s值越小场地减震效应越明显。采用地震动预测方程预测具体特定场地的地震动参数时,其结果存在一定的偏差和不确定性,通过场地δS2S_s值对预测值进行修正,将场地自身地震反应特性考虑到地震动参数估计中;相对于地震动预测方程的预测值,δS2S_s值修正的地震动参数更吻合实际观测值。研究可以期为考虑场地效应的特定场地地震动参数预测以及特定场地PSHA计算提供一条可靠的途径。
The recently proposed site-term(δS2 S_s) is a measure of the seismic response characteristics of a site.Through a systematic analysis of the different residual components by FA 2010 and BA 2008 GMPEs on a sizable set of 210 ground-motion data recorded at 20 stations in the 14 earthquake sequences of 2010 and 2012 in the Canterbury region of New Zealand, the site-terms of the selected stations are presented by the well-developed procedures of variability analysis of single-station records. The analytical results show that the site-term is solely interconnected with the prevailing geological conditions in the site but independent of GMPEs. The large site-term values potentially imply site amplification effects from model predictions using a simple site classification, while small values indicate possible site deamplification. When using the GMPEs based on global dataset to predict the ground motion parameters for a specific site, uncertainty will emerge and cause false prediction. The site-term can correct the predictions of GMPEs by taking into account of specific site properties.The corrected spectral values are more close to the observations than the predictions directly by GMPEs. The research results can provide reference for the PSHA calculation considering site effect and the prediction of site-specific ground motion.
The recently proposed site-term(δS2 S_s) is a measure of the seismic response characteristics of a site.Through a systematic analysis of the different residual components by FA 2010 and BA 2008 GMPEs on a sizable set of 210 ground-motion data recorded at 20 stations in the 14 earthquake sequences of 2010 and 2012 in the Canterbury region of New Zealand, the site-terms of the selected stations are presented by the well-developed procedures of variability analysis of single-station records. The analytical results show that the site-term is solely interconnected with the prevailing geological conditions in the site but independent of GMPEs. The large site-term values potentially imply site amplification effects from model predictions using a simple site classification, while small values indicate possible site deamplification. When using the GMPEs based on global dataset to predict the ground motion parameters for a specific site, uncertainty will emerge and cause false prediction. The site-term can correct the predictions of GMPEs by taking into account of specific site properties.The corrected spectral values are more close to the observations than the predictions directly by GMPEs. The research results can provide reference for the PSHA calculation considering site effect and the prediction of site-specific ground motion.
引文
[1]Bard P Y,Campillo M,Chavez-Garcia F J,et al.The Mexico earthquake of September 19,1985-A theoretical investigation of large-and small-scale amplification effects in the Mexico City valley[J].Earthquake Spectra,1988,4(3):609-633
[2]Rathje E M,Kottle A R,Trent W L.Influence of input motion and site property variabilities on seismic site response analysis[J].Journal of Geotechnical and Geoenvironmental Engineering,2010,136(4):607-619
[3]李小军.地震动参数区划图场地条件影响调整[J].岩土工程学报,2013,35(S2):21-29(Li Xiaojun.Adjustment of seismic ground motion parameters considering site effects in seismic zonation map[J].Chinese Journal of Geotechnical Engineering,2013,35(S2):21-29(in Chinese))
[4]陈国兴,战吉艳,刘建达,等.远场大地震作用下深软场地设计地震动参数研究[J].岩土工程学报,2013,35(9):1591-1599(Chen Guoxing,Zhan Jiyan,Liu Jianda,et al.Parameter study on ground motions design of deep soft site under far-field large earthquake[J].Chinese Journal of Geotechnical Engineering,2013,35(9):1591-1599(in Chinese))
[5]王鼎,李杰.工程场地地震动随机场的物理模型[J].中国科学:技术科学,2012,42(7):798-807(Wang Ding,Li Jie.A random physical model of seismic ground motion field on local engineering site[J].Science China Technology Science,2012,42(7):798-807(in Chinese))
[6]GB 18306-2015中国地震动参数区划图[S].北京:中国标准出版社,2015(GB 18306-2015 Seismic ground motion parameters zonation map of China[S].Beijing:Standards Press of China,2015(in Chinese))
[7]Atik L A,Abrahamson N A,Bommer J J,et al.The variability of ground-motion prediction Models and its components[J].Seismological Research Letters,2010,81(5):47-56
[8]Rodriguez-Marek A,Montalva G,Cotton F,et al.Analysis of single-station standard deviation using the KiK-net data[J].Bulletin of the Seismological Society of America,2011,101(3):1242-1258
[9]Faccioli E,Paolucci R,Vanini M.Evaluation of probabilistic site-specific seismic hazard methods and associated uncertainties,with application in the Po plain,Northern Italy[J].Bulletin of the Seismological Society of America,2015,105(5):2787-2807
[10]Rai M,Rodriguez-Marek A,Chiou B S.Empirical terrain-based topographic modification factors for use in ground motion prediction[J].Earthquake Spectra,2017,33(1):157-177
[11]Zhao J X,Jiang F,Ma Y,et al.Ground-Motion Prediction Equations for the vertical component from shallow crustal and upper-mantle earthquakes in japan using site classes as the site term[J].Bulletin of the Seismological Society of America,2017,107(5):2310-2327
[12]温瑞智,冀昆,任叶飞,等.基于谱比法的我国强震台站场地分类[J].岩石力学与工程学报,2015,34(6):1236-1241(Wen Ruizhi,Ji Kun,Ren Yefei,et al.Site classification for strong earthquake stations in China using spectral ratio method[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(6):1236-1241(in Chinese))
[13]Hélo?se C,Bard P Y,Rodriguez-Marek A.Site effect assessment using Kik-net data:part 1,a simple correction procedure for surface/downhole spectral ratios[J].Bulletin of Earthquake Engineering,2012,10:421-448
[14]Cauzzi C,Faccioli E.Broadband(0.05 to 20s)prediction of displacement response spectra based on worldwide digital records[J].Journal of Seismology,2008,12(4):453-475
[15]Faccioli E,Bianchini A,Villani M.New ground motion prediction equations for T>1s and their influence on seismic hazard assessment[C]//Proceedings of the University of Tokyo Symposium on Long-period Ground Motion and Urban Disaster Mitigation.Tokyo.Japan,2010
[16]CEN European Committee for Standardization.Eurocode 8:design of structures for earthquake resistance-Part 1:general rules,seismic actions and rules for buildings[S].Bruxelles:European Committee for Standardization,2004
[17]NZS 1170.5:2004 Structural design actions Part 5:Earthquake actions[S].New Zealand:Standards New Zealand,2004
[18]Boore M B,Atkinson G M.Ground motion prediction equations for the average horizontal component of PGA,PGV and 5%-damped PSA at spectral periods between0.01s and 10.0s[J].Earthquake Spectra,2008,34(1):99-138
[19]Cubrinovski M,Bradley B A,Wotherspoon L,et al.Geotechnical aspects of the 22 February 2011Christchurch Earthquake[J].Bulletin of the New Zealand Society for Earthquake Engineering,2011,44(4):205-226
[2]Rathje E M,Kottle A R,Trent W L.Influence of input motion and site property variabilities on seismic site response analysis[J].Journal of Geotechnical and Geoenvironmental Engineering,2010,136(4):607-619
[3]李小军.地震动参数区划图场地条件影响调整[J].岩土工程学报,2013,35(S2):21-29(Li Xiaojun.Adjustment of seismic ground motion parameters considering site effects in seismic zonation map[J].Chinese Journal of Geotechnical Engineering,2013,35(S2):21-29(in Chinese))
[4]陈国兴,战吉艳,刘建达,等.远场大地震作用下深软场地设计地震动参数研究[J].岩土工程学报,2013,35(9):1591-1599(Chen Guoxing,Zhan Jiyan,Liu Jianda,et al.Parameter study on ground motions design of deep soft site under far-field large earthquake[J].Chinese Journal of Geotechnical Engineering,2013,35(9):1591-1599(in Chinese))
[5]王鼎,李杰.工程场地地震动随机场的物理模型[J].中国科学:技术科学,2012,42(7):798-807(Wang Ding,Li Jie.A random physical model of seismic ground motion field on local engineering site[J].Science China Technology Science,2012,42(7):798-807(in Chinese))
[6]GB 18306-2015中国地震动参数区划图[S].北京:中国标准出版社,2015(GB 18306-2015 Seismic ground motion parameters zonation map of China[S].Beijing:Standards Press of China,2015(in Chinese))
[7]Atik L A,Abrahamson N A,Bommer J J,et al.The variability of ground-motion prediction Models and its components[J].Seismological Research Letters,2010,81(5):47-56
[8]Rodriguez-Marek A,Montalva G,Cotton F,et al.Analysis of single-station standard deviation using the KiK-net data[J].Bulletin of the Seismological Society of America,2011,101(3):1242-1258
[9]Faccioli E,Paolucci R,Vanini M.Evaluation of probabilistic site-specific seismic hazard methods and associated uncertainties,with application in the Po plain,Northern Italy[J].Bulletin of the Seismological Society of America,2015,105(5):2787-2807
[10]Rai M,Rodriguez-Marek A,Chiou B S.Empirical terrain-based topographic modification factors for use in ground motion prediction[J].Earthquake Spectra,2017,33(1):157-177
[11]Zhao J X,Jiang F,Ma Y,et al.Ground-Motion Prediction Equations for the vertical component from shallow crustal and upper-mantle earthquakes in japan using site classes as the site term[J].Bulletin of the Seismological Society of America,2017,107(5):2310-2327
[12]温瑞智,冀昆,任叶飞,等.基于谱比法的我国强震台站场地分类[J].岩石力学与工程学报,2015,34(6):1236-1241(Wen Ruizhi,Ji Kun,Ren Yefei,et al.Site classification for strong earthquake stations in China using spectral ratio method[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(6):1236-1241(in Chinese))
[13]Hélo?se C,Bard P Y,Rodriguez-Marek A.Site effect assessment using Kik-net data:part 1,a simple correction procedure for surface/downhole spectral ratios[J].Bulletin of Earthquake Engineering,2012,10:421-448
[14]Cauzzi C,Faccioli E.Broadband(0.05 to 20s)prediction of displacement response spectra based on worldwide digital records[J].Journal of Seismology,2008,12(4):453-475
[15]Faccioli E,Bianchini A,Villani M.New ground motion prediction equations for T>1s and their influence on seismic hazard assessment[C]//Proceedings of the University of Tokyo Symposium on Long-period Ground Motion and Urban Disaster Mitigation.Tokyo.Japan,2010
[16]CEN European Committee for Standardization.Eurocode 8:design of structures for earthquake resistance-Part 1:general rules,seismic actions and rules for buildings[S].Bruxelles:European Committee for Standardization,2004
[17]NZS 1170.5:2004 Structural design actions Part 5:Earthquake actions[S].New Zealand:Standards New Zealand,2004
[18]Boore M B,Atkinson G M.Ground motion prediction equations for the average horizontal component of PGA,PGV and 5%-damped PSA at spectral periods between0.01s and 10.0s[J].Earthquake Spectra,2008,34(1):99-138
[19]Cubrinovski M,Bradley B A,Wotherspoon L,et al.Geotechnical aspects of the 22 February 2011Christchurch Earthquake[J].Bulletin of the New Zealand Society for Earthquake Engineering,2011,44(4):205-226