局部地质条件对强地面运动影响的剪切波模拟
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摘要
采用多阶振型和有限差分联立的混合法，依据北京西集一郎府地区的地质条件，模拟了１９７６年唐山地震所引起的该区的剪切波运动；计算了工程上常用的峰值加速度和总能量．在夏垫断裂两侧的最大振幅和总能量的差异分别为２００％和７００％，研究结果可以解释唐山地震时西集一郎府一带所观测到的异常烈度．
In this paper a hybrid method, based on mode summation and finitedifferences, is used to simulate the ground inchon of SH wave in the Xiji-Langfuarea of Beijing induced by the 1976 Tangshan earthquake. We eshmate the maximumacceleration amplitude and total energy of ground inchon for engineering purposes. Onthe two sides of the Xiadian fault the maximum acceleration amplitude and totalenergy can vary by afactor of 200% and 700% respectively. Our results can explainthe observed anomalous intensity in the Xiji-Langfu area induced by the 1976Tangshan earthquake.
In this paper a hybrid method, based on mode summation and finitedifferences, is used to simulate the ground inchon of SH wave in the Xiji-Langfuarea of Beijing induced by the 1976 Tangshan earthquake. We eshmate the maximumacceleration amplitude and total energy of ground inchon for engineering purposes. Onthe two sides of the Xiadian fault the maximum acceleration amplitude and totalenergy can vary by afactor of 200% and 700% respectively. Our results can explainthe observed anomalous intensity in the Xiji-Langfu area induced by the 1976Tangshan earthquake.
引文
[1] Fah D, C Iodice, P Suhadolc, et al. A new method for the realistic estimation of seismic ground motionin megacities: the case of Rome. Earthquake Spectra, 1993, 9(4): 643-668.
[2] Fah D, P Suhadolc, St Mueller, et al. A hybrid method for the estimation of ground motion insedimentary basins: quantitative modeling for Mexico City. Bull. Seism. Soc. Am., 1994, 84(2):383-399.
[3]国家地震局《一九七六年唐山地震》编辑组.一九七六年唐山地震.北京:地震出版社, 1982.Compiling group of the 1976 Tangshan earthquake. State Seismological Bureau. The 1976 Tangshanearthquake. Beliing: Seismological Press, 1982.
[4]高振寰.唐山地震引起北京地区烈度异常区的原因分析.地震地质,1979,1(2):74-81.GAO Zhen-Huan. The analysis of anomalous areas of high intensity of Beijing area induced by theTangshan Earthquake. Seismology and Geology, 1979, 1(1): 74-87.
[5]蒋溥,王启呜,徐峰等.唐山地震引起的几个异常破坏区的原因探讨.地震地质, 1979, 1(1) 90-97.JIANG Bo, WANG Qi-Min, XU Feng, et al. The discussion on the anomalous areas of high intensitynearby Beijing caused by the Tangshan earthquake. Seismology and Geology, 1979, 1(1): 90-98.
[6] Panza G F, P Suhadolc. Complete strong inchon synthehcs. Computahonal Techniques, 1987, 4: 153-204.
[7]陈国英,宋仲和,安昌强等.华北地区三维地壳上地幔结构.地球物理学报, 1991, 34(2): 172-181CHEN Guo-Ying, SONG Zhong-He, AN Chang-Qiang, et al. Three dimensional crust and upper mantlestructure of the north China region. Chinese J. Geophys. (in Chinese), 1991, 34(2): 172-181.
[8]孙若昧,刘福田.京津唐地区地壳结构与强震的发生--I.P波速度结构.地球物理学报, 1995, 38(5): 599-607SUN Ruo-Mei, LIU Fu-Tian. Crust structure and strong earthquake in Beijing, Tianjin, Tangshan, Beijingarea L P wave velocity structure. Chinese J Geophy,s. (in Chinese), 1995, 38(5): 599-607.
[9]孙若昧,赵燕来,吴丹,京津唐地区地壳结构与强震的发生-II.S波速度结构.地球物理学报, 1996, 39(2): 347-355.SUN Ruo-Mei, ZHAO Yan-Lai, WU Dan. Crust structure and strong earthquake in Beijing, Tianjin,Tangshan area II. S wave velocity structure. Chinese J. Geophys. (in Chinese), 1996, 39(2): 347-355.
[10]周蕙兰.浅源走滑大震震源过程的某些特征.地球物理学报,1985,28(6):597-587.ZHOU Had-Lan. Some characterishcs of fracture processes of shallow strike-slip earthquakes. Chinese J.Geophys. (in Chinese), 1985, 28(6): 579-587.
[11]张之立,李钦祖,谷继成等.唐山地震的破裂过程及其力学分析.地震学报, 1980, 2(2); 111-129ZHANG Zhi-Li, LI Qin-Zu, GU Ji-Cheng, et al. The fracture processes of the Tangshan earthquake andanalysis of mechanics. Acta Seismologia Sinica, 1980, 2(2): 111-129.
[12] Xie L, Zhang M, A review: simulation of strong seismic motion in China. Earthquake Research in China.1993, 7(3): 243-257.
[13]孙若昧.地震波传播有限差分模拟的人工边界问题.地球物理进展,1996,11(3);53一58.SUN Ruo-Mei. Artificial boundary problems in finite-difference modeling for seismic wave propagation.Progress ic Geophysics, 1996, 11(3):53-58.
[14] L Knopoff, F Schwab, E Kausell. Interpretation of Lg. Geophys. J. R. AStr. Soc., 1973, 33: 389-404.
[15] G F Panza, G Calcapnile. Lg, Li and Rg from Rayleigh waves. Geopkys. J. R. Astr. Soc., 1975, 40:475-487.
[16] A A Gusev. Descriptive statishcal model of earthquake source radiation and its application to an estimationof short-period strong motion. Geophys. J. R. Astr. Soc., 1983, 74(3): 787-800.
[2] Fah D, P Suhadolc, St Mueller, et al. A hybrid method for the estimation of ground motion insedimentary basins: quantitative modeling for Mexico City. Bull. Seism. Soc. Am., 1994, 84(2):383-399.
[3]国家地震局《一九七六年唐山地震》编辑组.一九七六年唐山地震.北京:地震出版社, 1982.Compiling group of the 1976 Tangshan earthquake. State Seismological Bureau. The 1976 Tangshanearthquake. Beliing: Seismological Press, 1982.
[4]高振寰.唐山地震引起北京地区烈度异常区的原因分析.地震地质,1979,1(2):74-81.GAO Zhen-Huan. The analysis of anomalous areas of high intensity of Beijing area induced by theTangshan Earthquake. Seismology and Geology, 1979, 1(1): 74-87.
[5]蒋溥,王启呜,徐峰等.唐山地震引起的几个异常破坏区的原因探讨.地震地质, 1979, 1(1) 90-97.JIANG Bo, WANG Qi-Min, XU Feng, et al. The discussion on the anomalous areas of high intensitynearby Beijing caused by the Tangshan earthquake. Seismology and Geology, 1979, 1(1): 90-98.
[6] Panza G F, P Suhadolc. Complete strong inchon synthehcs. Computahonal Techniques, 1987, 4: 153-204.
[7]陈国英,宋仲和,安昌强等.华北地区三维地壳上地幔结构.地球物理学报, 1991, 34(2): 172-181CHEN Guo-Ying, SONG Zhong-He, AN Chang-Qiang, et al. Three dimensional crust and upper mantlestructure of the north China region. Chinese J. Geophys. (in Chinese), 1991, 34(2): 172-181.
[8]孙若昧,刘福田.京津唐地区地壳结构与强震的发生--I.P波速度结构.地球物理学报, 1995, 38(5): 599-607SUN Ruo-Mei, LIU Fu-Tian. Crust structure and strong earthquake in Beijing, Tianjin, Tangshan, Beijingarea L P wave velocity structure. Chinese J Geophy,s. (in Chinese), 1995, 38(5): 599-607.
[9]孙若昧,赵燕来,吴丹,京津唐地区地壳结构与强震的发生-II.S波速度结构.地球物理学报, 1996, 39(2): 347-355.SUN Ruo-Mei, ZHAO Yan-Lai, WU Dan. Crust structure and strong earthquake in Beijing, Tianjin,Tangshan area II. S wave velocity structure. Chinese J. Geophys. (in Chinese), 1996, 39(2): 347-355.
[10]周蕙兰.浅源走滑大震震源过程的某些特征.地球物理学报,1985,28(6):597-587.ZHOU Had-Lan. Some characterishcs of fracture processes of shallow strike-slip earthquakes. Chinese J.Geophys. (in Chinese), 1985, 28(6): 579-587.
[11]张之立,李钦祖,谷继成等.唐山地震的破裂过程及其力学分析.地震学报, 1980, 2(2); 111-129ZHANG Zhi-Li, LI Qin-Zu, GU Ji-Cheng, et al. The fracture processes of the Tangshan earthquake andanalysis of mechanics. Acta Seismologia Sinica, 1980, 2(2): 111-129.
[12] Xie L, Zhang M, A review: simulation of strong seismic motion in China. Earthquake Research in China.1993, 7(3): 243-257.
[13]孙若昧.地震波传播有限差分模拟的人工边界问题.地球物理进展,1996,11(3);53一58.SUN Ruo-Mei. Artificial boundary problems in finite-difference modeling for seismic wave propagation.Progress ic Geophysics, 1996, 11(3):53-58.
[14] L Knopoff, F Schwab, E Kausell. Interpretation of Lg. Geophys. J. R. AStr. Soc., 1973, 33: 389-404.
[15] G F Panza, G Calcapnile. Lg, Li and Rg from Rayleigh waves. Geopkys. J. R. Astr. Soc., 1975, 40:475-487.
[16] A A Gusev. Descriptive statishcal model of earthquake source radiation and its application to an estimationof short-period strong motion. Geophys. J. R. Astr. Soc., 1983, 74(3): 787-800.
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