| 汶川地震主震断层构造应力场数值分析 |
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| 引用本文： | 孙竹凤,范天佑.汶川地震主震断层构造应力场数值分析[J].北京理工大学学报,2010,30(3):253-257. |
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| 作者姓名： | 孙竹凤 范天佑 |
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| 作者单位： | 北京理工大学,宇航学院,北京,100081;北京理工大学,理学院,北京,100081 |
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| 基金项目： | 国家自然科学基金资助项目(10762016) |
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| 摘 要： | 以连续介质力学为基础,以地块动力学为指南,对2008年5月12日汶川Ms8.0地震的主震断层的构造应力场进行了定量分析.讨论了地块-地块、地块-断层和断层-断层间的相互作用.计算结果表明,应变能随断层破裂传播发生了迁移,在特定的边界条件下,能量场随断层的扩展而向边界迁移.从位移场、应力场和能量场的分布,对地震断层破裂的机制作了初步探讨.计算结果表明,汶川地震引发了川滇地区的地应力调整活动,该地震后在汶川-茂县断裂层上仍是应变能的集中分布区域,应该有能量释放.
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| 关 键 词： | 断层 地块 断层破裂传播 构造应力场 |
| 收稿时间： | 2009/9/22 0:00:00 |
Numerical Analysis on the Tectonic Stress Field of the Main Shock Faults in the Wenchuan Earthquake |
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| SUN Zhu-feng and FAN Tian-you.Numerical Analysis on the Tectonic Stress Field of the Main Shock Faults in the Wenchuan Earthquake[J].Journal of Beijing Institute of Technology(Natural Science Edition),2010,30(3):253-257. |
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| Authors: | SUN Zhu-feng and FAN Tian-you |
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| Institution: | 1.School of Aerospace Engineering;Beijing Institute of Technology;Beijing 100081;China;2.School of Science;China |
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| Abstract: | Based on the theories of continuum mechanics and block dynamics,the present study primarily analyzed the tectonic stress field of the main shock faults in the Wenchuan Ms 8.0 earthquake happened on May 12,2008.It discussed the interactions between block-block,block-fault,and fault-fault.The results showed that the strain energy migrates along with the fault propagation.The displacement filed,stress field and the distribution of total strain energy,and the mechanism of the process of the earthquake is explor... |
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| Keywords: | fault block broken process tectonic stress field |
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