| 1927年古浪8级大震破裂的三维数值理论模拟 |
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| 引用本文： | 侯康明,邓起东,刘百篪,韩有珍.1927年古浪8级大震破裂的三维数值理论模拟[J].西北地震学报,1998,20(3):59-65. |
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| 作者姓名： | 侯康明 邓起东 刘百篪 韩有珍 |
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| 作者单位： | 中国地震局兰州地震研究所,中国地震局地质研究所,中国地震局兰州地震研究所 |
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| 摘 要： | 在数值模拟计算的基础上,进一步从理论上论证了１９２７年古浪８级大震地表破裂带较短的原因．通过对地震烈度分布形态,地表破裂受阻的终止过程,理论模拟结果所显示的位移矢量的衰减过程,断裂受阻变形及最大剪应力分布特性等问题的研究,认为分布在主破裂带东西两端部的ＮＮＷ向断裂起到了“障碍构造”的作用,阻止了主破裂向东西方向的延伸扩展．
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| 关 键 词： | 甘肃 地震破裂 数值模拟 古浪地震 |
| 收稿时间： | 1997/7/3 0:00:00 |
3-D NUMERICAL SIMULATION OF SURFACE RUPTURE CAUSED BY THE 1927 GULANG Ms8 EARTHQUAKE |
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| HOU Kangming,DENG Qidong,LIU Baichi and HAN Youzhen.3-D NUMERICAL SIMULATION OF SURFACE RUPTURE CAUSED BY THE 1927 GULANG Ms8 EARTHQUAKE[J].Northwestern Seismological Journal,1998,20(3):59-65. |
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| Authors: | HOU Kangming DENG Qidong LIU Baichi and HAN Youzhen |
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| Institution: | Lanzhou Institute of Seismology, CSB, Lanzhou 730000,Institute of Geology, CSB, Beijing 100029,Lanzhou Institute of Seismology, CSB, Lanzhou 730000 and Lanzhou Institute of Seismology, CSB, Lanzhou 730000 |
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| Abstract: | Based on calculating of numerical simulation,the reason why the length of the surface rupture caused by the 1927 Gulang MS8 earthquake is much short was further interpreted theoretically.Distribution pattern of seismic intensity,impeded processes of surface rupture,decline process of displacement vector,fault deformation and distribution characteristics of the maximum shearing stress were studied.Results show the NNW-trending faults are a kind of "barrier structure" which impeded propagation of the seismic rupture toward east and west,and resulted in a short rupture length. |
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| Keywords: | Gansu Seismic rupture Numerical simulation Gulang earthquake |
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