A plastic-damage approach to the excavation response of a circular opening in weak rock
文献类型：期刊论文
| 作者 | Guan, Kai2; Zhu, Wancheng2; Yu, Qinglei2; Cui, Lan1; Song, Fei3 |
| 刊名 | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 126期号:-页码:- |
| 关键词 | Ground response curve Rock damage Excavation damaged zone Strength-stiffness degradation Confining stress dependence |
| ISSN号 | 0886-7798 |
| 英文摘要 | During opening construction, the accumulated wall displacement and the developing excavation damaged zone are the results of stress redistribution and inelastic behavior induced by both the microcracking damage and the irreversible plastic deformation. The current approach to predict ground response to excavation disturbance is usually based on the Convergence-Confinement Method, which fails to consider the rock damage and the plasticdamage coupled mechanism, resulting in inaccurate estimation of rock deformation, particularly in the case of the weak rock with high deformability. This study establishes a plastic-damage theoretical approach for a circular opening by a kinematic decomposition of strains into an elastic, plastic and damage parts within the framework of finite strain using a hypoelastic-plastic theory, in order to investigate the inelastic behaviorinduced excavation response. In this regard, the damage model provides the effective stress to the plasticity model defining the yield criterion, in combination with the strength-stiffness degradation and damage evolution. The numerical implementation is given and two examples are considered for validation. Extensive works are then carried out to clarify some issues, including the capacity of the model to characterize the inelastic behavior, the role of rock damage and confining stress dependence on ground response, and the preliminary critical support pressure for the residual failure zone. |
| 学科主题 | Construction & Building Technology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000797302800002 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35083]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 2.Center for Rock Instability and Seismicity Research, School of Resource and Civil Engineering, Northeastern University, Shenyang 110819, China 3.Department of Civil and Environmental Engineering, Universitat Polit`ecnica de Catalunya, Barcelona 08034, Spain |
| 推荐引用方式 GB/T 7714 | Guan, Kai,Zhu, Wancheng,Yu, Qinglei,et al. A plastic-damage approach to the excavation response of a circular opening in weak rock[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2022,126(-):-. |
| APA | Guan, Kai,Zhu, Wancheng,Yu, Qinglei,Cui, Lan,&Song, Fei.(2022).A plastic-damage approach to the excavation response of a circular opening in weak rock.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,126(-),-. |
| MLA | Guan, Kai,et al."A plastic-damage approach to the excavation response of a circular opening in weak rock".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 126.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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