近场地震动估计中高、低频地震动的叠加
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摘要
研究了近场地震动场估计中高、低频地震动叠加过程中的4个问题,分别是高频地震动位移和速度时程的计算方法、滤波与微分或积分的顺序、叠加与微分或积分的顺序以及传递函数与叠加的顺序问题。最后,基于这4个问题的分析研究,提出了一个适合大型工程场地地震动估计的高、低频合成方案,该方案能在确保结算结果精度的同时最大程度地节省工作量。
Four issues in the superposition of ground motions of low and high frequencies in near-field ground motion prediction were studied:(1)the method to calculate the displacement and velocity time histories in high frequencies;(2)the sequence of filtering,integration or differentiation;(3)the sequence of superposition,integration or differentiation;(4)the sequence of superposition and multiplying transfer function.Finally,a detailed scheme of superposition for the ground motion prediction of a large-scale engineering project was proposed based on the analysis of the four issues,which could save the computing time as well as ensure the precision of result.
Four issues in the superposition of ground motions of low and high frequencies in near-field ground motion prediction were studied:(1)the method to calculate the displacement and velocity time histories in high frequencies;(2)the sequence of filtering,integration or differentiation;(3)the sequence of superposition,integration or differentiation;(4)the sequence of superposition and multiplying transfer function.Finally,a detailed scheme of superposition for the ground motion prediction of a large-scale engineering project was proposed based on the analysis of the four issues,which could save the computing time as well as ensure the precision of result.
引文
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[6]Beresnev I A,Atkinson G.Stochastic finite-fault modeling of ground motions from the 1994 Northridge,California,earthquake,I.Validationon rock sites[J].Bull.Seism.Soc.Am.,1998,88(6):1392-1401.
[7]Motazedian D,Atkinson G M.Stochastic finite-fault modeling based on a dynamic corner frequency[J].Bull.Seism.Soc.Am.,2005,95(3):995-1010.
[8]Hanks T C,McGuire R K.The character of high-frequency strong ground motion[J].Bull.Seism.Soc.Am.,1981,71:2071-2095.
[9]Joyner W B,Boore D M.On simulating large earthquakes by Green’s function addition of smaller earthquakes[J].American Geophysical Mono-graph,1986,37:269-274.
[10]Boore D M.Simulation of ground motion using the stochastic method[J].Pure Appl.Geophys.,2003,160:635-676.
[11]马强.强震观测数据实时处理方法的研究[D].哈尔滨:中国地震局工程力学研究所,2002.
[12]张冬丽.基于数值格林函数方法的近场长周期强地震动模拟[D].哈尔滨:中国地震局工程力学研究所,2005.
[2]Kamae K,Irikura K,Pitarka A.A technique for simulating strong ground motion using hybrid Green's function[J].Bull.Seism.Soc.Am.,1998,88:357-367.
[3]Pitarka A,Somerville P,Fukushima Y,Uetake T,Irikura K.Simulation of near-fault strong-ground motion using hybrid green's functions[J].Bull.Seism.Soc.Am.,2000,90:566-586.
[4]陶夏新,孙晓丹,等.九龙江断裂上6级强烈地震引起的漳州盆地及周边地区地震动预测工程报告[R].哈尔滨:哈尔滨工业大学,2007.
[5]陶夏新,孙晓丹,等.兰州市活断层地震危害性评价工程报告[R].哈尔滨:哈尔滨工业大学,2007.
[6]Beresnev I A,Atkinson G.Stochastic finite-fault modeling of ground motions from the 1994 Northridge,California,earthquake,I.Validationon rock sites[J].Bull.Seism.Soc.Am.,1998,88(6):1392-1401.
[7]Motazedian D,Atkinson G M.Stochastic finite-fault modeling based on a dynamic corner frequency[J].Bull.Seism.Soc.Am.,2005,95(3):995-1010.
[8]Hanks T C,McGuire R K.The character of high-frequency strong ground motion[J].Bull.Seism.Soc.Am.,1981,71:2071-2095.
[9]Joyner W B,Boore D M.On simulating large earthquakes by Green’s function addition of smaller earthquakes[J].American Geophysical Mono-graph,1986,37:269-274.
[10]Boore D M.Simulation of ground motion using the stochastic method[J].Pure Appl.Geophys.,2003,160:635-676.
[11]马强.强震观测数据实时处理方法的研究[D].哈尔滨:中国地震局工程力学研究所,2002.
[12]张冬丽.基于数值格林函数方法的近场长周期强地震动模拟[D].哈尔滨:中国地震局工程力学研究所,2005.
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