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Shear Rate Effects on the Post-peak Shear Behaviour and Acoustic Emission Characteristics of Artificially Split Granite Joints
文献类型：期刊论文
| 作者 | Meng, Fanzhen; Wong, Louis Ngai Yuen; Zhou, Hui; Yu, Jin; Cheng, Guangtan |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2019 |
| 卷号 | 52期号:7页码:2155-2174 |
| 关键词 | Granite joint Stick-slip Acoustic emission Energy release AE b value |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-018-1722-8 |
| 英文摘要 | Rock joints may be sheared at different rates under quasi-static or dynamic loading. Understanding the mechanical response of rock joints at different shear rates is of great importance for the mitigation of dynamic geo-hazards such as earthquakes, fault slip rockbursts and landslides. In this study, direct shear tests at various shear rates (0.001-0.1mm/s) under different normal stresses (3-40MPa) are conducted on split granite joints, and the influences of shear rates on the shear strength, post-peak shear behaviour and acoustic emission (AE) characteristics are analysed and discussed. The research findings suggest that both peak and residual shear strengths tend to decrease with increasing shear rate. Stick-slip occurs on all the joints, during which stress drop values increase with increasing shear displacement and normal stress. The stress drop magnitudes during stick-slip decrease with shear rate, while the time intervals between stress drops during stick-slip increase with shear rate. Further, the energy rate tends to increase while the AE events decrease with increasing shear rate, which is caused by the time-dependent deformation behaviour. The AE b value decreases linearly with the shear rate on a logarithmic scale, and the influence is more significant under high normal stress conditions. The variations in the b value can reflect the evolution process (first loading at lower and then higher shear rates) of dynamic geo-hazards and can be used as an effective indicator to predict the dynamic shear failure of granite joints in a temporal sequence. The results of this study will encourage better understanding of the rate-dependent shear behaviour of rough granite joints, particularly under high normal stress, and will provide some references for the monitoring and prediction of dynamic geo-hazards with respect to the AE (or micro-seismic) technique. |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000472537500009 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/14952]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Qingdao Univ Technol, Coll Sci, Qingdao 266033, Shandong, Peoples R China; 2.Univ Hong Kong, Dept Earth Sci, Pokfulam, Hong Kong, Peoples R China; 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China; 4.Hua Qiao Univ, Inst Geotech Engn, Xiamen, Fujian, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, Fanzhen,Wong, Louis Ngai Yuen,Zhou, Hui,et al. Shear Rate Effects on the Post-peak Shear Behaviour and Acoustic Emission Characteristics of Artificially Split Granite Joints[J]. ROCK MECHANICS AND ROCK ENGINEERING,2019,52(7):2155-2174. |
| APA | Meng, Fanzhen,Wong, Louis Ngai Yuen,Zhou, Hui,Yu, Jin,&Cheng, Guangtan.(2019).Shear Rate Effects on the Post-peak Shear Behaviour and Acoustic Emission Characteristics of Artificially Split Granite Joints.ROCK MECHANICS AND ROCK ENGINEERING,52(7),2155-2174. |
| MLA | Meng, Fanzhen,et al."Shear Rate Effects on the Post-peak Shear Behaviour and Acoustic Emission Characteristics of Artificially Split Granite Joints".ROCK MECHANICS AND ROCK ENGINEERING 52.7(2019):2155-2174. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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