郯庐断裂带鲁苏沂沭段对汶川地震波的隔震效应
|
摘要
郯庐断裂带鲁苏沂沭段由几务平行的深大断裂构成。地震波传播通过郯庐断裂带会产生多次的反射与折射,适当的条件下会产生断层隔震效应。本文报告了江苏地区在汶川地震中的人员反应,根据弹性波传播理论分析了江苏境内的汶川地震记录。分析结果表明,郯庐断裂带在嘉山以北为郯庐断裂带鲁苏沂沭段,几条平行的深大断裂有隔震效应,汶川与嘉山南侧的连线形成一条地震动屏蔽线。在此线以北,郯庐断裂带鲁苏沂沭段阻碍了地震波的传播,其东侧,紧邻郯庐断裂带并为郯庐断裂带屏蔽的强震观测台如宿迁台、新沂台和淮安台都没有触发,这表明了郯庐断裂带对地震波的隔震作用。
The middle section of Tanlu Fault Belt is consisted of 4 ~ 5 parallel deep huge faults.When earthquake waves transmit through the fault,which can inject and be reflected several times in the inner fault,and can be isolated in some conditions.The human responses in Jiangsu to Wenchuan earthquake are studied.And the process of wave transmiting is analyzed.A line from Wenchuan toward Jiashan forms a character line.In region of the North of the line and west of Tanlu Fault Belt,the peak acceleration of Wenchuan earthquake is remarkablely redused.The fact of fault isolation is thus verified.
The middle section of Tanlu Fault Belt is consisted of 4 ~ 5 parallel deep huge faults.When earthquake waves transmit through the fault,which can inject and be reflected several times in the inner fault,and can be isolated in some conditions.The human responses in Jiangsu to Wenchuan earthquake are studied.And the process of wave transmiting is analyzed.A line from Wenchuan toward Jiashan forms a character line.In region of the North of the line and west of Tanlu Fault Belt,the peak acceleration of Wenchuan earthquake is remarkablely redused.The fact of fault isolation is thus verified.
引文
[1]科尼科夫.关于地质环境对震动传播的影响[M]//地震危险性定量评价问题.北京:地震出版社,1981.69- 73. Kenikov.On geologic environment affecting vibration transmission[M]// Some Problems in Quantitative Analysis Earthquake Risk.Beijing:Seismological Press,1981.69-73.
[2]陈强,高维明,梁北援.鲁南8.5级大震的构造力学分析[J].中国地震,1988,4(3):47-53. Chen Q,Gao W M,Liang B Y.Analysis M 8.5 earthquake at South-Shangdong by tectonic mechanic metod[J].Earthquake Research in China,1988,4 (3),47-53.
[3]黄永林.沂沭断裂带断层减震的可能性与研究方法[C]//纪念南京基准地震台建台70周年论文集.北京:地震出版社,2002.289-296.
[4]GB 17742-2008,中国地震烈度表[S].
[5]朱升初,杨伟林,唐忠良,等.汶川地震在江苏的强震动记录及其地震影响场[J].防灾减灾工程学报,2009,29 (2):231-236. Zhu S C,Yang W L,Tang Z L,et al.Strong motion records and earthquake effect in Jiangsu Province related to the Wenchuan Ms 8.0 earthquake[J].Journal of Disaster Prevention and Mitigation Engineering, 2009,29(2):231-236.
[6]周锡元.断层的地震效应与震害影响[M]//地震小区划——理论与实践.北京:地震出版社,1989,243-244.
[2]陈强,高维明,梁北援.鲁南8.5级大震的构造力学分析[J].中国地震,1988,4(3):47-53. Chen Q,Gao W M,Liang B Y.Analysis M 8.5 earthquake at South-Shangdong by tectonic mechanic metod[J].Earthquake Research in China,1988,4 (3),47-53.
[3]黄永林.沂沭断裂带断层减震的可能性与研究方法[C]//纪念南京基准地震台建台70周年论文集.北京:地震出版社,2002.289-296.
[4]GB 17742-2008,中国地震烈度表[S].
[5]朱升初,杨伟林,唐忠良,等.汶川地震在江苏的强震动记录及其地震影响场[J].防灾减灾工程学报,2009,29 (2):231-236. Zhu S C,Yang W L,Tang Z L,et al.Strong motion records and earthquake effect in Jiangsu Province related to the Wenchuan Ms 8.0 earthquake[J].Journal of Disaster Prevention and Mitigation Engineering, 2009,29(2):231-236.
[6]周锡元.断层的地震效应与震害影响[M]//地震小区划——理论与实践.北京:地震出版社,1989,243-244.
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