| 拉应力条件下岩石细观力学本构模型和渗透系数张量研究(Ⅱ):各向异性渗透系数张量及算例 |
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| 引用本文： | 韦立德,杨春和,徐卫亚.拉应力条件下岩石细观力学本构模型和渗透系数张量研究(Ⅱ):各向异性渗透系数张量及算例[J].岩土力学,2005,26(12):1996-2000. |
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| 作者姓名： | 韦立德 杨春和 徐卫亚 |
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| 作者单位： | 1. 中国科学院岩土力学重点实验室,武汉,430071
2. 河海大学,岩土工程研究所,南京,210098 |
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| 基金项目： | 国家重点基础研究发展规划项目(973)(No.2002CB412704)，国家自然科学基金(No.50374064,50334060)资助 |
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| 摘 要： | 建立了同时考虑微裂纹发展过程、渗透压和变形影响的岩石各向异性渗透系数张量,推导了所建立本构模型和渗透系数张量的单轴拉伸方程,并和实验结果进行了对比。结果表明,建立的本构模型能够反映岩石的弹性阶段、非线性强化阶段、应力跌落阶段和应变软化阶段的特征;能够很好地反映有渗流时岩石抗拉强度降低等渗流岩石力学特征;建立的渗透系数张量正确反映了随着岩石损伤的发展岩石中渗流的各向异性规律。该模型也适用于岩体。
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| 关 键 词： | 岩石力学 岩石 渗透系数张量 各向异性 损伤 |
| 文章编号： | 1000-7598-（2005）12-1996-05 |
| 收稿时间： | 2004-07-16 |
| 修稿时间： | 2004-10-21 |
Study on constitutive model and permeable coefficient tensor of rock under tensile load with micromechanics ( Ⅱ ) :Anisotropic permeable coefficient tensor and example |
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| WEI Li-de,YANG Chun-he,XU Wei-ya.Study on constitutive model and permeable coefficient tensor of rock under tensile load with micromechanics ( Ⅱ ) :Anisotropic permeable coefficient tensor and example[J].Rock and Soil Mechanics,2005,26(12):1996-2000. |
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| Authors: | WEI Li-de YANG Chun-he XU Wei-ya |
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| Institution: | 1. Key Laboratory of Rock and Soil Mechanics, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China |
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| Abstract: | There are a few paper discussed establishing permeable coefficient tensor of rock under tensile load until now.In this paper,an anisotropic permeable coefficient tensor of rock under tensile load,thingking about hydraulic pressure,microcrack extending and distortion,is established.The equations of the theories in previous paper and this paper are deduced for rock under axial tensile loading.The presented models are compared with experimental data.The comparative results show that the constitutive model can reflect all phases of stress-strain curve and the character that hydraulic pressure make rock strength lower.The permeable coefficient tensor can reflect the anisotropy and the evolvement of seepage in rock.The permeable coefficient tensor can be applied to rock mass too. |
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| Keywords: | rock mechanics rock permeable coefficient tensor anisotropy damage |
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