Comparison Study on Damage Characteristics of Deeply Buried Granite Under Triaxial Cyclic Loading and Unloading
文献类型：期刊论文
| 作者 | Ma, Yongan2,3; Yu, Chong2,3; Li, Haibo2,3 ; Ma, Xingdong1; Li, Shaojun2,3
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| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2024-11-14 |
| 页码 | 26 |
| 关键词 | Triaxial cyclic loading and unloading Damage variables Damage evolution laws Deformation parameter degradation Acoustic emission Energy dissipation |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-024-04241-6 |
| 英文摘要 | The scope and degree of damage are crucial for the stability of deep underground engineering during construction and operation. This study investigates the damage evolution characteristics of deeply buried granite throughout the entire process of triaxial cyclic loading and unloading compression experiments under different confining pressures. The research first focuses on the evolution patterns of deformation parameters, energy dissipation, and acoustic emission (AE) activity. Subsequently, a comparative analysis of six different damage quantification methods was conducted to identify the most suitable method. The results show that, with increasing axial strain, the elastic modulus first increases and then decreases, while the Poisson's ratio gradually increases. The increase in confining pressure leads to an overall increase in both elastic modulus and Poisson's ratio. As the axial strain increases, the dissipation ratio initially decreases, then increases, and finally stabilizes, while the crushing ratio first increases, then decreases, and ultimately stabilizes. AE activity shows a clear Kaiser effect and silence phenomenon, with a strong correlation between the post-peak strength degradation and AE counts and AE energy. The evolution patterns of damage variables for the six quantification methods all exhibit S-shaped growth, with damage rates showing a slow-fast-slow variation. The damage variable defined by the crushing energy method aligns with the crack propagation law and has the smallest error in damage threshold compared to existing standards. The results of this study provide important references for rock damage testing and quantification. A novel method for identifying the deflection point of the stress-strain curve.Multi-perspective observation of damage evolution in deep rock.Theory of nonlinear dissipation of crushing energy considering confining pressure effects.Optimal damage characterization method based on standards and crack propagation laws. |
| 资助项目 | the Wuhan Science and Technology Bureau of China[2020YFA0711802] ; National Key R&D Program of China[U22A20239] ; National Natural Science Foundation of China[2023020201010081] ; Wuhan Science and Technology Bureau of China |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001354851600001 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/43113]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Yu, Chong |
| 作者单位 | 1.Power China Chengdu Engn Corp Ltd, Chengdu 610072, Sichuan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Yongan,Yu, Chong,Li, Haibo,et al. Comparison Study on Damage Characteristics of Deeply Buried Granite Under Triaxial Cyclic Loading and Unloading[J]. ROCK MECHANICS AND ROCK ENGINEERING,2024:26. |
| APA | Ma, Yongan,Yu, Chong,Li, Haibo,Ma, Xingdong,&Li, Shaojun.(2024).Comparison Study on Damage Characteristics of Deeply Buried Granite Under Triaxial Cyclic Loading and Unloading.ROCK MECHANICS AND ROCK ENGINEERING,26. |
| MLA | Ma, Yongan,et al."Comparison Study on Damage Characteristics of Deeply Buried Granite Under Triaxial Cyclic Loading and Unloading".ROCK MECHANICS AND ROCK ENGINEERING (2024):26. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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