Experimental and Numerical Study on the Anchoring Mechanism of an Anchor Bolt Considering its Lateral Restraint Effect
文献类型：期刊论文
| 作者 | Yuan, Wei3; Lai, Xipeng3; Pei, Zihao3; Liu, Sifan3; Li, Haibin3; Wang, Wei3; Fu, Xiaodong1; Wen, Zhijie2 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2024-07-07 |
| 页码 | 17 |
| 关键词 | Rock bolt Anchoring mechanism Shear strength Direct shear test Lateral restraint |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-024-03981-9 |
| 英文摘要 | Anchoring is a highly effective means to reinforce jointed rock masses. In addition to the axial force from the anchor bolt, the effect of its transverse force in constraining the displacement of the structural plane cannot be ignored. Thus, this paper studies the combined action of the axial and shear forces of an anchor bolt on enhancing the shear strength of the anchored joint. In this work, first, laboratory direct shear tests are conducted to study the evolution of the peak shear strength of the anchored joint with increasing angle between the shear direction and bolt inclination. Second, to further verify this trend, numerical simulation with the finite difference method is used to simulate the same direct shear tests to reveal the lateral and axial stresses and deformations of the bolt. Finally, according to classical beam theory, the mechanical analysis model of a bolt subjected to the combined action of axial tension and lateral shear is established, which takes the realistic stress and deformation patterns of the bolt from the numerical simulation into account. The results show that the lateral restraint of the bolt plays a significant role in the shear strength of the anchored joint, its enhancing effect first increases and then decreases with increasing installation angle, and the optimal installation angle providing the maximum shear strength is approximately 60 degrees. In addition, it is concluded that the shear resistance of the bolt is mainly due to its axial force when the installation angle is relatively small; conversely, the shear resistance of the bolt is mainly due to its shear force when the installation angle is relatively large. A new approach for calculating the anchoring force considering the combined action of the transverse restraint and axial restraint of the bolt is presented.A calculation method for the optimal anchoring angle is presented, and its value is suggested to be approximately 60 degrees in this study.The contribution rates of the axial force and tangential force to the anchoring force are not equal and vary with the change in the anchoring angle. |
| 资助项目 | Technology Support Plan of Guizhou Province ; State Key Laboratory of Mining Disaster Prevention and Control (Shandong University of Science and Technology), Ministry of Education)[JMDPC202401] ; Key Cultivation Project of Basic Research in Higher Educational Institutions in Hebei Province[JZX2024011] ; Hebei Natural Science Foundation[E2021210128] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001263695400001 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41934]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Wen, Zhijie |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430064, Peoples R China 2.Guizhou Univ, Min Coll, Guiyang 550025, Peoples R China 3.Shijiazhuang Tiedao Univ, Sch Civil Engn, Shijiazhuang 050043, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yuan, Wei,Lai, Xipeng,Pei, Zihao,et al. Experimental and Numerical Study on the Anchoring Mechanism of an Anchor Bolt Considering its Lateral Restraint Effect[J]. ROCK MECHANICS AND ROCK ENGINEERING,2024:17. |
| APA | Yuan, Wei.,Lai, Xipeng.,Pei, Zihao.,Liu, Sifan.,Li, Haibin.,...&Wen, Zhijie.(2024).Experimental and Numerical Study on the Anchoring Mechanism of an Anchor Bolt Considering its Lateral Restraint Effect.ROCK MECHANICS AND ROCK ENGINEERING,17. |
| MLA | Yuan, Wei,et al."Experimental and Numerical Study on the Anchoring Mechanism of an Anchor Bolt Considering its Lateral Restraint Effect".ROCK MECHANICS AND ROCK ENGINEERING (2024):17. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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