Analytical solutions of stress and displacement in strain softening rock mass around a newly formed cavity
文献类型：期刊论文
| 作者 | Lu Yan-er2; Yang Wu1 |
| 刊名 | JOURNAL OF CENTRAL SOUTH UNIVERSITY
 |
| 出版日期 | 2013 |
| 卷号 | 20期号:5页码:1397-1404 |
| 关键词 | strain softening Hoek-Brown criterion step-wise elasto-plastic model damage factor shear dilation |
| ISSN号 | 2095-2899 |
| DOI | 10.1007/s11771-013-1627-3 |
| 英文摘要 | The closed form solutions of the stress and displacement in strain softening rock mass around a newly formed cavity are derived with a three step-wise elasto-plastic model. Hoek-Brown criterion is adopted as the yielding criterion of rock mass. Damage factors are proposed to account for degradation of the material parameters to reflect the degree of strain softening. The surrounding rock mass around the cavity is divided into three regions: elastic region, strain softening region and residual state region. The analytical solutions of stress, strain, displacement and radius of each region are obtained. The effects of the strain softening and shear dilatancy behavior on the results are investigated with parametric studies. The results show that the radii of the residual state region and strain softening region in the surrounding rock mass with higher damage degree are larger. The radii of the residual state region and strain softening region are 1-2 times and 1.5-3 times of the cavity radius, respectively. The radial and tangential stresses decrease with the increase of the damage factor. The displacement of the cavity wall for the case with maximum plastic bulk strain is nearly twice than that with no dilation. Rock mass moves more toward the center for the case with larger damage factor and shear dilation. The area of the plastic region is larger when the damage factors are considered. The displacements in the surrounding rock mass increase with the increase of the damage factors and shear dilation factors. The solutions can be applied to the stability analysis and support design of the underground excavation. |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000318396200033 |
| 出版者 | JOURNAL OF CENTRAL SOUTH UNIV TECHNOLOGY |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3450]  |
| 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.China Commun Construct Co Second Highway Consulta 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; |
| 推荐引用方式 GB/T 7714 | Lu Yan-er,Yang Wu. Analytical solutions of stress and displacement in strain softening rock mass around a newly formed cavity[J]. JOURNAL OF CENTRAL SOUTH UNIVERSITY,2013,20(5):1397-1404. |
| APA | Lu Yan-er,&Yang Wu.(2013).Analytical solutions of stress and displacement in strain softening rock mass around a newly formed cavity.JOURNAL OF CENTRAL SOUTH UNIVERSITY,20(5),1397-1404. |
| MLA | Lu Yan-er,et al."Analytical solutions of stress and displacement in strain softening rock mass around a newly formed cavity".JOURNAL OF CENTRAL SOUTH UNIVERSITY 20.5(2013):1397-1404. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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