Intermittent slipping of landslide regulated by dilatancy evolution and velocity-weakening friction law: an efficient numerical scheme
文献类型：期刊论文
| 作者 | JAN Chyan-deng; YANG Ray-yeng; HWUNG Hwung-hweng; CHEN Wen-yau |
| 刊名 | Journal of Mountain Science
 |
| 出版日期 | 2016-08 |
| 卷号 | 13期号:8页码:1333-1344 |
| 关键词 | Landslide Stability analysis Intermittent slipping Dilatancy angle |
| ISSN号 | 1672-6316 |
| 通讯作者 | CHEN Wen-yau |
| 英文摘要 | When a block of dense sandy soil moves downhill, the shear-induced soil dilatancy along the basal shear boundary produces a negative value of excess pore pressure that increases the basal frictional resistance. Dilatancy angle, , the degree to which the basal soil dilates due to the shear, normally evolves during slope failure. A study by other researchers shows that if is constant, the block of dense soil will remain stable (or unstable) sliding when the velocity-weakening rate of the basal friction coefficient of the block is small (or large) enough. Moreover, during unstable sliding processes, the block of dense soil exhibits "periodic" patterns of intermittent slipping. Here, we used a more efficient and accurate numerical scheme to revisit that study. We expanded their model by assuming evolves during slope failure. Consequently, we acquired completely different results. For instance, even though the velocity-weakening rate of the friction coefficient is fixed at the same smaller (or larger) value that those researchers use, the stable (or unstable) steady states of landslide they predict will inversely change to unstable (or stable) when decreases (or increases) with the increase of slide displacement to a value small (or large) enough. Particularly, in unstable processes, the soil block exhibits "aperiodic" styles of intermittent slipping, instead of "periodic". We found out that the stick states appearing later last longer (or shorter) in the case of decreasing (or increasing) . Moreover, because the basic states of landslides with impacts of dilatancy evolution are not steady nor periodic, traditional stability-analysis methods cannot be "directly" used to analyze the stability of such landslides. Here, we broke through this technical problem to a degree. We showed that combining a concept called "quasi-steady-state approximation" with a traditional stability-analysis technique can qualitatively predict the instability onset of the landslides. Through this study, we demonstrated that the combination of Chebyshev collocation (CC) and 4th-order Runge-Kutta methods is more accurate and efficient than the numerical scheme those researchers use. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/17436]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 No.8 |
| 推荐引用方式 GB/T 7714 | JAN Chyan-deng,YANG Ray-yeng,HWUNG Hwung-hweng,et al. Intermittent slipping of landslide regulated by dilatancy evolution and velocity-weakening friction law: an efficient numerical scheme[J]. Journal of Mountain Science,2016,13(8):1333-1344. |
| APA | JAN Chyan-deng,YANG Ray-yeng,HWUNG Hwung-hweng,&CHEN Wen-yau.(2016).Intermittent slipping of landslide regulated by dilatancy evolution and velocity-weakening friction law: an efficient numerical scheme.Journal of Mountain Science,13(8),1333-1344. |
| MLA | JAN Chyan-deng,et al."Intermittent slipping of landslide regulated by dilatancy evolution and velocity-weakening friction law: an efficient numerical scheme".Journal of Mountain Science 13.8(2016):1333-1344. |
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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