| 单轴压缩岩石中缺陷的演化规律及岩石强度 | |
| 刘晓丽 ; 王思敬 ; 王恩志 ; 王建新 ; 胡波 ; LIU Xiaoli ; WANG Sijing ; WANG Enzhi ; WANG Jianxin ; HU Bo | |
| 2010-05-13 ; 2010-05-13 | |
| 关键词 | 岩石力学 材料缺陷 单轴压缩 应变软化 剪切破坏带 rock mechanics flaws in materials uniaxial compression strain softening shear failure band TU452 |
| 其他题名 | EVOLUTIONARY RULES OF FLAWS IN ROCK SUBJECTED TO UNIAXIAL COMPRESSION AND ROCK STRENGTH |
| 中文摘要 | 利用自主开发的岩土工程计算机辅助分析系统GeoCAAS,采用混合的Mohr-Coulomb剪切破坏准则与拉应力破坏准则,考虑材料塑性屈服后的软化特性,研究单轴压缩条件下含缺陷岩石的变形特性与强度,探讨缺陷的演化规律及其对岩石宏观力学强度的影响。对于含单个缺陷的岩样,缺陷位置的不同对岩石强度影响较大。边界上的缺陷不但能够决定岩石的最终剪切破坏带的分布,而且还极大地影响岩石的强度;岩石内部的单个缺陷对剪切破坏面的分布影响较大,而对岩石强度却影响较小。对于含多个随机缺陷的岩石,研究了缺陷体积含量与岩石强度的关系。将岩石中缺陷的体积含量近似为岩石的孔隙度,通过不同孔隙度的砂岩的室内单轴压缩试验对上述研究成果进行验证。研究成果在一定程度上可以为室内岩石试验和岩土工程提供参考。; A new software GeoCAAS(geo-engineering computer aided analysis system) is developed.Adopting Mohr-Coulomb criterion combined with tensile stress failure criterion and considering the softening characters of material after plastic yield,the deformation and strength of rocks with flaws under uniaxial compression are studied;and the evolutionary rule of flaws in rock and its effect on the macro-mechanical uniaxial compression strength(UCS) are discussed.For the rock with single flaw,the initial position of the flaw affects the rock UCS considerably.The flaw on the boundary of rock can determine the distribution of the final shear band and reduce the rock UCS greatly.The internal flaw has the same important effect on the distribution of the shear band,but little effect on the rock UCS.For the rock specimens with multiple randomly distributed flaws,the relationship between the volume content of flaws and rock UCS is studied.By considering approximately the volume content of flaws in rock to be porosity of the rock,the study results mentioned above are verified by using the uniaxial compression tests of rock specimens with different porosities.The study provides practical guides in some degree for rock mechanical tests and rock engineering. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/32179]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 刘晓丽,王思敬,王恩志,等. 单轴压缩岩石中缺陷的演化规律及岩石强度[J],2010, 2010. |
| APA | 刘晓丽.,王思敬.,王恩志.,王建新.,胡波.,...&HU Bo.(2010).单轴压缩岩石中缺陷的演化规律及岩石强度.. |
| MLA | 刘晓丽,et al."单轴压缩岩石中缺陷的演化规律及岩石强度".(2010). |
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