An experimental and analytical study of rate-dependent shear behaviour of rough joints
文献类型：期刊论文
| 作者 | Li, Hua1; Deng, Jianhui1; Yin, Jianhua5; Qi, Shengwen3; Zheng, Bowen3 ; Zhu, Jianbo2,4
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| 刊名 | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
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| 出版日期 | 2021-06-01 |
| 卷号 | 142页码:14 |
| 关键词 | Rock joint Direct shear Rate effect |
| ISSN号 | 1365-1609 |
| DOI | 10.1016/j.ijrmms.2021.104702 |
| 英文摘要 | Understanding the shear behaviour of rough joints is of great significance for dealing with rock engineering problems. In many cases, rock joints are often subjected to dynamic loadings, which are usually caused by explosions, impacts or earthquakes, etc. Until now, the dynamic shear characteristics of rock joints have not been well understood. In the present study, we investigate joint shear behaviour at different shear rates and develop a rate-dependent constitutive model of rough joints. Testing results shows that the shear/frictional strength of joints with meso-roughness (i.e., planar joints) is independent on the shear rate, while the strength of joints with macro-unevenness (i.e., saw-toothed joints) increases with the shear rate. Under identical boundary conditions, the residual strength of joints with macro-unevenness approximates to the kinetic frictional strength of planar joints. Based on the testing results, the shear stress-displacement curve of rough joints was divided into four phases, i.e., linear elastic phase, shear hardening phase, shear softening phase and residual strength phase. A viscous joint model was thus proposed and validated through comparison with laboratory measurements. This new model correlates the static joint shear stiffness with dynamic one, and has the ability to describe the shear stiffness evolution during the whole shearing process. Based on the proposed model, a hypothesis about shear rate effects of rough joints was introduced and then verified through numerical modelling. The findings in this paper could facilitate better understanding the dynamic behaviour of rough joints and be useful for analyzing rock engineering problems with discontinuous rock masses. |
| WOS关键词 | ROCK JOINTS ; TENSILE BEHAVIOR ; DYNAMIC STRENGTH ; MODEL ; TESTS ; COMBINATION ; VELOCITY ; CONCRETE |
| 资助项目 | Program for Guangdong Introducing Innovative and Enterpreneurial Teams[2019ZT08G315] ; National Science Foundation of China[U19A2098] ; Hong Kong Jockey Club |
| WOS研究方向 | Engineering ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000663073800004 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | Program for Guangdong Introducing Innovative and Enterpreneurial Teams ; Program for Guangdong Introducing Innovative and Enterpreneurial Teams ; National Science Foundation of China ; National Science Foundation of China ; Hong Kong Jockey Club ; Hong Kong Jockey Club ; Program for Guangdong Introducing Innovative and Enterpreneurial Teams ; Program for Guangdong Introducing Innovative and Enterpreneurial Teams ; National Science Foundation of China ; National Science Foundation of China ; Hong Kong Jockey Club ; Hong Kong Jockey Club ; Program for Guangdong Introducing Innovative and Enterpreneurial Teams ; Program for Guangdong Introducing Innovative and Enterpreneurial Teams ; National Science Foundation of China ; National Science Foundation of China ; Hong Kong Jockey Club ; Hong Kong Jockey Club ; Program for Guangdong Introducing Innovative and Enterpreneurial Teams ; Program for Guangdong Introducing Innovative and Enterpreneurial Teams ; National Science Foundation of China ; National Science Foundation of China ; Hong Kong Jockey Club ; Hong Kong Jockey Club |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102049]  |
| 专题 | 地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室 |
| 通讯作者 | Zhu, Jianbo |
| 作者单位 | 1.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu, Peoples R China 2.Shenzhen Univ, Shenzhen Key Lab Deep Underground Engn Sci & Gree, Shenzhen, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China 4.Shenzhen Univ, Coll Civil & Transportat Engn, Inst Deep Earth Sci & Green Energy, Guangdong Prov Key Lab Deep Earth Sci & Geotherma, Shenzhen, Peoples R China 5.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Hua,Deng, Jianhui,Yin, Jianhua,et al. An experimental and analytical study of rate-dependent shear behaviour of rough joints[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2021,142:14. |
| APA | Li, Hua,Deng, Jianhui,Yin, Jianhua,Qi, Shengwen,Zheng, Bowen,&Zhu, Jianbo.(2021).An experimental and analytical study of rate-dependent shear behaviour of rough joints.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,142,14. |
| MLA | Li, Hua,et al."An experimental and analytical study of rate-dependent shear behaviour of rough joints".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 142(2021):14. |
入库方式： OAI收割
来源：地质与地球物理研究所
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