Post-liquefaction shearing behaviour of saturated gravelly soils: Experimental study and discrete element simulation
文献类型：期刊论文
| 作者 | Wang, Yong2; Wang, Yanli1; Kong, Lingwei2; Sun, Zhiliang2 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 12期号:5页码:1119-1130 |
| ISSN号 | 1674-7755 |
| 关键词 | Post-liquefaction Micro-mechanism Gravelly soil Deformation Discrete element method (DEM) |
| DOI | 10.1016/j.jrmge.2020.01.007 |
| 英文摘要 | To investigate the post-liquefaction shearing behaviour of saturated gravelly soil, laboratory tests were conducted using a static-dynamic multi-purpose triaxial apparatus. In addition, numerical simulations using the discrete element method (DEM) were performed to preliminarily understand the micro-mechanism of gravelly soil in monotonic loading after liquefaction. The influences of dry density, initial confining stress and degree of liquefaction on the post-liquefaction shearing behaviour of gravelly soil were discussed, and the evolution of the micro-parameters of the granular system was also analysed. The results show that the stress-strain responses of gravelly soil after liquefaction can be divided into three stages: (1) low strength stage, (2) super-linear strength recovery stage, and (3) sublinear strength recovery stage, which are distinctly different from those of the general saturated gravelly soil without previous cyclic loading. The initial state and prior dynamic stress history have significant influences on the post-liquefaction shearing behaviour of gravelly soil. The DEM simulation revealed that the average coordination number sharply increases, the contact normal shows an obvious orientation distribution, and the destroyed force chain backbones are reconstructed in the monotonic reloading process after liquefaction. The evolution of the micro-parameters of the granular system clearly reflects the interior interaction process and micro-mechanisms in the particles during the three different stages of the macro-mechanical behaviour of gravelly soil. (C) 2020 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. |
| 资助项目 | National Natural Science Foundation of China[51979269] ; National Natural Science Foundation of China[51779017] ; National Natural Science Foundation of China[41702348] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000580247200018 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/24921]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Wang, Yong |
| 作者单位 | 1.Minist Water Resources, Key Lab Geotech Mech & Engn, Yangtze River Sci Res Inst, Wuhan 430010, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yong,Wang, Yanli,Kong, Lingwei,et al. Post-liquefaction shearing behaviour of saturated gravelly soils: Experimental study and discrete element simulation[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2020,12(5):1119-1130. |
| APA | Wang, Yong,Wang, Yanli,Kong, Lingwei,&Sun, Zhiliang.(2020).Post-liquefaction shearing behaviour of saturated gravelly soils: Experimental study and discrete element simulation.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,12(5),1119-1130. |
| MLA | Wang, Yong,et al."Post-liquefaction shearing behaviour of saturated gravelly soils: Experimental study and discrete element simulation".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 12.5(2020):1119-1130. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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