根据渐进谱的统计规律生成地震加速度时程
|
摘要
基于美国西部80条基岩上的近场强震记录,采用Nakayama方法生成记录的渐进谱,并参照Kameda方式,用统计方法建立了根据震级、距离等地震参数预测渐进谱的统计模型.提出一种以渐进谱为目标谱的生成幅值和频率非平稳地震加速度时程的迭代方法.由于考虑了渐进谱幅值和相位的相互影响,所生成的时程的相位也是时频非平稳的,并在相位调整中识别了相位谱增量符号以加速迭代收敛进程.最后根据统计回归的目标渐进谱模型和本文提出的拟合目标渐进谱的方法,可生成不同震级、距离条件下的幅值和频率均非平稳的地震加速度时程.
By using the technique for evolutionary power spectrum proposed by Nakayama and with reference to the Kameda formula, an evolutionary spectrum prediction model for given earthquake magnitude and distance is established based on the 80 near-source acceleration records at rock surface with large magnitude from the ground motion database of western U S. Then a new iteration method is developed for generation of random accelerograms non-stationary both in amplitude and frequency which are compatible with target evolutionary spectrum. The phase spectra of those simulated accelerograms are also non-stationary in time and frequency domains since the interaction between amplitude and phase angle has been considered during the generation. Furthermore, the sign of the phase spectrum increment is identified to accelerate the iteration. With the proposed statistical model for predicting evolutionary power spectra and the new method for generating compatible time history, the artificial random earthquake accelerograms non-stationary both in amplitude and frequency for certain magnitude and distance can be provided.
By using the technique for evolutionary power spectrum proposed by Nakayama and with reference to the Kameda formula, an evolutionary spectrum prediction model for given earthquake magnitude and distance is established based on the 80 near-source acceleration records at rock surface with large magnitude from the ground motion database of western U S. Then a new iteration method is developed for generation of random accelerograms non-stationary both in amplitude and frequency which are compatible with target evolutionary spectrum. The phase spectra of those simulated accelerograms are also non-stationary in time and frequency domains since the interaction between amplitude and phase angle has been considered during the generation. Furthermore, the sign of the phase spectrum increment is identified to accelerate the iteration. With the proposed statistical model for predicting evolutionary power spectra and the new method for generating compatible time history, the artificial random earthquake accelerograms non-stationary both in amplitude and frequency for certain magnitude and distance can be provided.
引文
曹晖,赖明,白绍良.2002.基于小波变换的地震地面运动仿真研究[J].土木工程学报,35(4):40-46.
何鸣,刘光斌,梁树辉.2003.一种基于模态分解的时频分析方法[J].现代电子技术,18:15-17.
胡聿贤.1999.地震安全性评价技术教程[M].北京:地震出版社:302-308.
霍俊荣.1989.近场强地面运动衰减规律的研究[D]:[学位论文].哈尔滨:中国地震局工程力学研究所:99-111.
李中付,华宏星,宋汉文,等.2001.一维信号的模态分解与重构研究[J].数据采集与处理,16(3):324-329.
石春香,罗奇峰.2003.时程信号的Hilbert-Huang变换与小波分析[J].地震学报,25(4):399-405.
曾珂,牛荻涛.2005.基于时变ARMA序列的随机地震动模型[J].工程抗震与加固改造,27(3):81-86.
朱继梅.2000.非稳态振动信号分析[J].振动与冲击,19(1):87-91.
Goto H,Sugito M,Kameda H,et al.1984.Prediction of Non-stationary Earthquake Motions for Moderate and GreatEarthquakes on Rock Surface[R].Annuals,Disaster Prevention Research Institute,Kyoto University,27(B-2):19-48.
Goto H,Toki K,Aiyoshi T.1966.Generation of artificial earthquake on digital computer for aseismic design of structure[C]∥Proceedings ofthe2nd Japan Earthquake Engineering Symposium.Tokyo,Japan:[s.n.]:25-30.
Kameda H.1975.Evolutionary Spectra of Seismogramby Multifilter[J].J Eng Mech Div,ASCE,101(6):787-801.
Kameda H,Goto H,Sugito M,et al.1979.Prediction of non-stationary earthquake motions for given magnitude,dis-tance and specific site condition[C]∥Proceedings ofthe2nd US National Conference on Earthquake Engineering.California:Stanford University:243-252.
Kameda H,Sugito M,Asamara T.1980.Si mulated earthquake motions scaledfor magnitude,distance andlocal soil con-ditions[C]∥Pro7th World Conf Earthq Eng.Istanbul,Turkey:[s.n.].2:295-302.
Nakayama T,Fuji wara H,Komatsu S,et al.1994.Non-stationary response and reliability of linear systems under seis-mic loadings[C]∥Schueller,Shinozuka,Yao eds.Structural Safety&Reliability.Rotterdam:Balkema:2179-2186.
Priestley MB.1965.Evolutionary spectra and non-stationary processes[J].Journal of the Royal Statistical Society,Series B Methodological,27(2):204-237.
Priestley MB.1967.Power spectral analysis of non-stationary randomprocesses[J].Journal of Sound and Vibration,6(1):86-97.
Sugito M,Furumoto Y,Sugiyama T.2000.Strong motion prediction on rock surface by superposed evolutionary spectra[C]∥Pro12th World Conf Earthq Eng.Auckland,New Zealand:[s.n.].2111/4/A:1-8.
何鸣,刘光斌,梁树辉.2003.一种基于模态分解的时频分析方法[J].现代电子技术,18:15-17.
胡聿贤.1999.地震安全性评价技术教程[M].北京:地震出版社:302-308.
霍俊荣.1989.近场强地面运动衰减规律的研究[D]:[学位论文].哈尔滨:中国地震局工程力学研究所:99-111.
李中付,华宏星,宋汉文,等.2001.一维信号的模态分解与重构研究[J].数据采集与处理,16(3):324-329.
石春香,罗奇峰.2003.时程信号的Hilbert-Huang变换与小波分析[J].地震学报,25(4):399-405.
曾珂,牛荻涛.2005.基于时变ARMA序列的随机地震动模型[J].工程抗震与加固改造,27(3):81-86.
朱继梅.2000.非稳态振动信号分析[J].振动与冲击,19(1):87-91.
Goto H,Sugito M,Kameda H,et al.1984.Prediction of Non-stationary Earthquake Motions for Moderate and GreatEarthquakes on Rock Surface[R].Annuals,Disaster Prevention Research Institute,Kyoto University,27(B-2):19-48.
Goto H,Toki K,Aiyoshi T.1966.Generation of artificial earthquake on digital computer for aseismic design of structure[C]∥Proceedings ofthe2nd Japan Earthquake Engineering Symposium.Tokyo,Japan:[s.n.]:25-30.
Kameda H.1975.Evolutionary Spectra of Seismogramby Multifilter[J].J Eng Mech Div,ASCE,101(6):787-801.
Kameda H,Goto H,Sugito M,et al.1979.Prediction of non-stationary earthquake motions for given magnitude,dis-tance and specific site condition[C]∥Proceedings ofthe2nd US National Conference on Earthquake Engineering.California:Stanford University:243-252.
Kameda H,Sugito M,Asamara T.1980.Si mulated earthquake motions scaledfor magnitude,distance andlocal soil con-ditions[C]∥Pro7th World Conf Earthq Eng.Istanbul,Turkey:[s.n.].2:295-302.
Nakayama T,Fuji wara H,Komatsu S,et al.1994.Non-stationary response and reliability of linear systems under seis-mic loadings[C]∥Schueller,Shinozuka,Yao eds.Structural Safety&Reliability.Rotterdam:Balkema:2179-2186.
Priestley MB.1965.Evolutionary spectra and non-stationary processes[J].Journal of the Royal Statistical Society,Series B Methodological,27(2):204-237.
Priestley MB.1967.Power spectral analysis of non-stationary randomprocesses[J].Journal of Sound and Vibration,6(1):86-97.
Sugito M,Furumoto Y,Sugiyama T.2000.Strong motion prediction on rock surface by superposed evolutionary spectra[C]∥Pro12th World Conf Earthq Eng.Auckland,New Zealand:[s.n.].2111/4/A:1-8.
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