| 芦山地震的发生对周围断层影响的数值模拟 |
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| 关键词:Lushan earthquake Sichuan–Yunnan region Coulomb failure stress numerical simulation |
| 基金项目:中央公益性科研院所基本科研业务专项(编号: ZDJ2012-09; ZDJ2011-08);国家科技支撑计划项目(编号: 2012BAK19B03-6) |
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| Impact of the Lushan Earthquake on the Surrounding Faults: Insights from Numerical Modeling |
| The stress change of the surrounding faults induced by the Lushan earthquake deserves attention. In this paper, the authors developed a three-dimensional nonlinear finite element model to explore the co-seismic loading/unloading effect, based on the coseismic static slip data deduced from the field body waveform record inversion. The preliminary results showed that the Lushan earthquake caused the lading effects on the mid-south Longmen Shan, Minjiang, Barkam, northwestern Xianshuihe, south Daliangshan, and south Xiaojiang faults; the mid-south Longmen Shan fault, in particular, had the significant increase which reached 0.035 MPa; Minjiang fault reached 0.0075 MPa, Barkam fault reached 0.0031 MPa and northwestern Xianshuihe fault reached 0.0008 MPa. These results corresponded well with those deduced from the coseismic strain accumulation and release aspects, and can hence provide a basis for the seismic risk analysis in the future. |
| LI Yu-jiang,CHEN Lian-wang,LIU Shao-feng,YANG Shu-xin,JING Yan.2014.Impact of the Lushan Earthquake on the Surrounding Faults: Insights from Numerical Modeling[J].Acta Geoscientica Sinica,35(5):627-634. |
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