Modelling transient unloading-triggered dynamic responses in rock mass under a non-hydrostatic geo-stress
文献类型：期刊论文
| 作者 | Mei, Wanquan1,3; Pan, Pengzhi1; Li, Mei2; Xia, Yuanyou3; Wang, Zhaofeng1; Zhang, Yuanhang3; Wang, Zhide3 |
| 刊名 | COMPUTERS AND GEOTECHNICS
 |
| 出版日期 | 2024-11-01 |
| 卷号 | 175页码:21 |
| 关键词 | Transient excavation unloading Dynamic responses Non-hydrostatic geo-stress field Integral transform Numerical inversion Elasto-plastic cellular automaton |
| ISSN号 | 0266-352X |
| DOI | 10.1016/j.compgeo.2024.106672 |
| 英文摘要 | Transient excavation unloading of in situ stress affects the stability of surrounding rock in the deep tunnel engineering. This paper focuses on the dynamic responses triggered by the transient unloading of a non-hydrostatic geo-stress field in deep-buried engineering. With resort to the integral transformation, the frequency-domain responses of stress, displacement and velocity components induced by the transient unloading are obtained under a non-hydrostatic in situ stress. Based on the numerical inversion of the Laplace transformation, the corresponding time-domain theoretical results are determined. Agreement of the current solutions with the existing results and the numerical simulations verifies the proposed scheme in this paper. The elastic analytical results indicate that the influence of unloading path on the stress redistribution is characterized by the unloading rate. The higher the unloading rate is, the larger the stress magnitude is. The smaller the unloading time is, the more remarkable vibration is. The elasto-plastic dynamic numerical responses are investigated on the basis of a self-developed code, elasto-plastic cellular automaton (EPCA), which is a module of CASRock. The numerical results demonstrate that the transient excavation unloading results in the stress redistribution and concentration of surrounding rock mass, inducing damage for the case of exceeding the capacity of rock mass. For the small lateral pressure coefficient (less than 0.25), the tensile-shear failure is the major damage mechanism of surrounding rock, while the shear failure is the major damage mechanism for the large lateral pressure coefficient. The analytical and numerical results can provide theoretical basis for the support and reinforcement of underground tunnel. |
| 资助项目 | National Natural Science Foundation of China[52339001] ; National Natural Science Foundation of China[52125903] ; National Natural Science Foundation of China[42077228] |
| WOS研究方向 | Computer Science ; Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001297899700001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42346]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Pan, Pengzhi; Li, Mei |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 2.Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Hubei, Peoples R China 3.Wuhan Univ Technol, Sch Civil Engn & Architecture, Wuhan 430070, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mei, Wanquan,Pan, Pengzhi,Li, Mei,et al. Modelling transient unloading-triggered dynamic responses in rock mass under a non-hydrostatic geo-stress[J]. COMPUTERS AND GEOTECHNICS,2024,175:21. |
| APA | Mei, Wanquan.,Pan, Pengzhi.,Li, Mei.,Xia, Yuanyou.,Wang, Zhaofeng.,...&Wang, Zhide.(2024).Modelling transient unloading-triggered dynamic responses in rock mass under a non-hydrostatic geo-stress.COMPUTERS AND GEOTECHNICS,175,21. |
| MLA | Mei, Wanquan,et al."Modelling transient unloading-triggered dynamic responses in rock mass under a non-hydrostatic geo-stress".COMPUTERS AND GEOTECHNICS 175(2024):21. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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