Dynamic process analysis of the Niumiangou landslide triggered by the Wenchuan earthquake using the finite difference method and a modified discontinuous deformation analysis
文献类型：期刊论文
| 作者 | Huang Da; Meng Qiu-jie; Song Yi-xiang; Cui Sheng-hua; Cen Duo-feng |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2021 |
| 卷号 | 18期号:4页码:1034-1048 |
| 关键词 | Wenchuan earthquake Discontinuous deformation analysis (DDA) Niumiangou landslide Amplification effects Displacement-dependent friction model |
| ISSN号 | 1672-6316 |
| 英文摘要 | The Niumiangou landslide was the largest landslide triggered by the 2008 Wenchuan earthquake, which was significantly affected by the amplification effect of seismic acceleration. The ring-shear experiments indicated that the materials in the source area of the Niumiangou landslide were subjected to friction degradation under a big shear displacement, which may result in rapid movement of the landslide. In order to better understand the landslide movement and study the effect of the friction degradation on movement mechanisms, the dynamic process of Niumiangou landslide was simulated with a new numerical method, which combines the finite difference method (FDM) and the discontinuous deformation analysis (DDA). First, the FDM was used to study the initiation time, amplification effect and velocity of the landslide. Afterwards, these initiation velocities were applied to the blocks in the DDA model by corresponding coordination in the FDM model. A displacement-dependent friction model of the sliding surface was incorporated into DDA code to further understand the kinetic behavior of the landslide. The results show that the displacement-dependent friction strongly decreases the friction coefficient of sliding surface under a big displacement, which can obviously promote the run-out and velocity of landslide. The model output well matches the topographic map formed by the landslide. This implies that the proposed model can be applied to the simulation of earthquake-induced landslides with amplification effect, and the friction degradation model is important to clarify the movement mechanism of high-speed and long-distance landslides. |
| 语种 | 英语 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/57323]  |
| 专题 | Journal of Mountain Science_Journal of Mountain Science-2021_Vol18 No.4 |
| 推荐引用方式 GB/T 7714 | Huang Da,Meng Qiu-jie,Song Yi-xiang,et al. Dynamic process analysis of the Niumiangou landslide triggered by the Wenchuan earthquake using the finite difference method and a modified discontinuous deformation analysis[J]. JOURNAL OF MOUNTAIN SCIENCE,2021,18(4):1034-1048. |
| APA | Huang Da,Meng Qiu-jie,Song Yi-xiang,Cui Sheng-hua,&Cen Duo-feng.(2021).Dynamic process analysis of the Niumiangou landslide triggered by the Wenchuan earthquake using the finite difference method and a modified discontinuous deformation analysis.JOURNAL OF MOUNTAIN SCIENCE,18(4),1034-1048. |
| MLA | Huang Da,et al."Dynamic process analysis of the Niumiangou landslide triggered by the Wenchuan earthquake using the finite difference method and a modified discontinuous deformation analysis".JOURNAL OF MOUNTAIN SCIENCE 18.4(2021):1034-1048. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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