利用随机有限断层法计算海河断裂的地震动
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摘要
通过构建横向均匀成层的地震断层模型,利用随机有限断层法,计算了海河断裂发生6.5级地震的地震动分布。计算结果克服了现行综合概率法计算结果不能体现近场效应的缺陷,并反映出断层上盘效应等特点,该结果可作为最大可信地震动应用于抗震设防变形验算,同时还可以作为评价综合概率法结果不确定性的一个参考,对海河断裂影响带的防灾减灾具有一定的借鉴价值。
The Haihe Fault is a major active fault in Tianjin.It is an important basis for the seismologists to determine the potential earthquake sources,and it plays a decisive role for people to select the aseismic design parameters.In this paper,we make a homogeneous layer of horizontal fault model to compute the effect of ground motion of a hypothetic M6.5 earthquake generated by the Haihe Fault using stochastic finite-fault method.The new method overcomes the shortcomings of the integrated probability method that can not reflect the near filed effect.And it reflects the upfault feature.The result from the new method can serve as the maximum credible ground motion to check seismic fortification deformation.The result which is useful for disaster reduction in this zone can also serve as a reference for integrated probability calculations.
The Haihe Fault is a major active fault in Tianjin.It is an important basis for the seismologists to determine the potential earthquake sources,and it plays a decisive role for people to select the aseismic design parameters.In this paper,we make a homogeneous layer of horizontal fault model to compute the effect of ground motion of a hypothetic M6.5 earthquake generated by the Haihe Fault using stochastic finite-fault method.The new method overcomes the shortcomings of the integrated probability method that can not reflect the near filed effect.And it reflects the upfault feature.The result from the new method can serve as the maximum credible ground motion to check seismic fortification deformation.The result which is useful for disaster reduction in this zone can also serve as a reference for integrated probability calculations.
引文
史家平.2008.地震动合成方法比较与研究[D].大连:大连理工大学.
陶夏新,王国新.2003.近场强地震动模拟中对破裂的方向性效应和上盘效应的表达[J].地震学报,25(2):191-198.
王国新,史家平.2008.近场强地震动合成方法研究及地震动模拟[J].东北地震研究,24(2):4-10.
王海云.2004.近场强地震动预测的有限断层震源模型[D].哈尔滨:中国地震局工程力学研究所.
Anderson,J G,Hough S E.1984.Amodel for the shape of the fourier am-plitude spectrums of acceleration at high frequencies[J].BSSA,74(5):1969-1993.
Atkinson G M,Boore D M.1995.Ground motion relations for easternnorth America[J].BSSA,85(1):17-30.
Atkinson G M.1996.The High-frequency shape of the souree spectrumforearthquakes in eastern and western Canada[J].BSSA,86(1A),106-112.
Beresnev I A,Atkinson G.1997.Modeling finite—fault radiation from theω2spectrum[J].BSSA,87(1):67-84.
Boore D M.1983.Stochastic simulation of high-frequency ground motionsbased on seismological models of the radiated spectra[J].BSSA,73(6):1865-1983.
Boore D M.2003.Simulation of ground motion using the stochastic method[J].Pure appl.Geophys.160(3-4):639-661.
Brune J N.1970.Tectonic stress and the spectra of seismic shear waves from earthquakes[J].J.Geophys.Res.,75(26):4997-5009.
Wehs D,Coppersmith K.1994.Newempirical relationships among magni-tude,rupture length,rupture width,rupture area,and surface dis-placement[J].BSSA,84(4):974-1002.
①赵瑞斌,易立新.2009.中医临床研究基地中国针灸中心大厦项目场地安全性评价报告.
②赵瑞斌,易立新.2010.天津市文化中心建设项目场地震安全性评价报告.
陶夏新,王国新.2003.近场强地震动模拟中对破裂的方向性效应和上盘效应的表达[J].地震学报,25(2):191-198.
王国新,史家平.2008.近场强地震动合成方法研究及地震动模拟[J].东北地震研究,24(2):4-10.
王海云.2004.近场强地震动预测的有限断层震源模型[D].哈尔滨:中国地震局工程力学研究所.
Anderson,J G,Hough S E.1984.Amodel for the shape of the fourier am-plitude spectrums of acceleration at high frequencies[J].BSSA,74(5):1969-1993.
Atkinson G M,Boore D M.1995.Ground motion relations for easternnorth America[J].BSSA,85(1):17-30.
Atkinson G M.1996.The High-frequency shape of the souree spectrumforearthquakes in eastern and western Canada[J].BSSA,86(1A),106-112.
Beresnev I A,Atkinson G.1997.Modeling finite—fault radiation from theω2spectrum[J].BSSA,87(1):67-84.
Boore D M.1983.Stochastic simulation of high-frequency ground motionsbased on seismological models of the radiated spectra[J].BSSA,73(6):1865-1983.
Boore D M.2003.Simulation of ground motion using the stochastic method[J].Pure appl.Geophys.160(3-4):639-661.
Brune J N.1970.Tectonic stress and the spectra of seismic shear waves from earthquakes[J].J.Geophys.Res.,75(26):4997-5009.
Wehs D,Coppersmith K.1994.Newempirical relationships among magni-tude,rupture length,rupture width,rupture area,and surface dis-placement[J].BSSA,84(4):974-1002.
①赵瑞斌,易立新.2009.中医临床研究基地中国针灸中心大厦项目场地安全性评价报告.
②赵瑞斌,易立新.2010.天津市文化中心建设项目场地震安全性评价报告.
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