Discrete Element Analyses of a Realistic-shaped Rock Block Impacting Against a Soil Buffering Layer
文献类型：期刊论文
| 作者 | Shen, Weigang4; Zhao, Tao3,4; Dai, Feng4; Crosta, Giovanni B.2; Wei, Houzhen1 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2020-04-22 |
| 页码 | 16 |
| 关键词 | Irregular rock block Impact Soil buffering layer Discrete element method Impact force |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-020-02116-0 |
| 英文摘要 | This study is devoted to understanding the impact of irregularly shaped rock blocks against a soil buffering layer above a rock shed via numerical simulations by discrete element method (DEM). In the DEM model, the rock block is represented by an assembly of densely packed and bonded spherical particles with the block shape reconstructed from the laser scanning results of a real rock block. The soil buffering layer is modeled as a loose packing of cohesionless frictional spherical particles, while the rock shed is simplified as a layer of fixed particles. The DEM model is first validated by modeling the impact of a cubic block against a soil buffering layer. Then, it is employed to investigate the dynamic interaction between a realistic-shaped rock block and the soil buffering layer. The numerical results show that the geometry of the contact surface between the rock block and soil layer can play a significant influence on the impact force of the rock block and the force acting on the rock shed. For the tested conditions, the distribution of stress on the rock shed can be well described by the Gaussian function, which seems to be independent on the geometry of the contact surface. In addition, the simplification of realistic-shaped rock blocks as spheres in the traditional DEM modeling approaches can significantly underestimate of the impact force. The established modeling strategy serves as a starting point for investigating the rock block shape. The proposed results can contribute to the choice of buffering layer for designing the rock shed. |
| 资助项目 | National Natural Science Foundation of China[51779164] ; National Natural Science Foundation of China[41602289] ; National Natural Science Foundation of China[41877260] ; State Key Laboratory of Hydraulics and Mountain River Engineering (Sichuan University)[Skhl1808] ; State Key Laboratory of Hydraulics and Mountain River Engineering (Sichuan University)[2016-0756] ; Fondazione CARIPLO |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000528162700001 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/23998]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Dai, Feng |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Milano Bicocca, Dept Earth & Environm Sci, Piazza Sci 4, I-20126 Milan, Italy 3.Brunel Univ London, Dept Civil & Environm Engn, London UB8 3PH, England 4.Sichuan Univ, Coll Water Resource & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shen, Weigang,Zhao, Tao,Dai, Feng,et al. Discrete Element Analyses of a Realistic-shaped Rock Block Impacting Against a Soil Buffering Layer[J]. ROCK MECHANICS AND ROCK ENGINEERING,2020:16. |
| APA | Shen, Weigang,Zhao, Tao,Dai, Feng,Crosta, Giovanni B.,&Wei, Houzhen.(2020).Discrete Element Analyses of a Realistic-shaped Rock Block Impacting Against a Soil Buffering Layer.ROCK MECHANICS AND ROCK ENGINEERING,16. |
| MLA | Shen, Weigang,et al."Discrete Element Analyses of a Realistic-shaped Rock Block Impacting Against a Soil Buffering Layer".ROCK MECHANICS AND ROCK ENGINEERING (2020):16. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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