层状岩体各向异性损伤模型及验证
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1.贵州大学资源与环境工程学院;2.贵州省地矿局第二工程勘察院;3.贵州省建筑设计研究院

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TU 45

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Anisotropic Damage Model of Layered Rock Mass and Its Verification
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Affiliation:

College of Resources and Environment Engineering, Guizhou University

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    为推导层状岩体各向异性损伤模型,研究损伤对层状岩体力学参数的劣化程度,通过层面局部坐标系下的两组损伤变量对横观各向同性弹性本构方程进行修正,经坐标转换形成整体坐标系下的损伤本构方程,采用室内单轴压缩试验和三轴压缩试验结果验证该损伤模型的合理性。研究结果表明:①通过层状岩体损伤模型计算所得的强度和变形参数均可较好地反映试验结果,并具有各向异性,计算出的应力-应变曲线与试验结果吻合较好;②通过该损伤模型,仅需层面倾角为0°和90°时的两组变形参数即可求解各倾角下的应力-应变关系;③通过对摩尔-库伦屈服准则中的参数进行损伤劣化修正,可对试件破坏后的力学行为进行预测。研究结果对于层状岩体的试验研究、理论计算和工程建设具有一定的指导意义。

    Abstract:

    In order to derive the anisotropic damage model of layered rock mass and study the influence of damage on the deterioration degree of material mechanical parameters in different directions, the transversely isotropic elastic constitutive equation was corrected by two sets of damage variables in the local coordinate system of bedding plane. By coordinate transformation, an damage model in the global coordinate system was formed. The rationality of the damage model was verified by the results of indoor uniaxial compression test and triaxial compression test. The results show that: ①The strength and deformation parameters calculated by the damage model of layered rock mass can reflect the test results well, and have obvious anisotropy. The calculated curves are also consistent with the experimental results. ②Through the damage model, the stress-strain relationship at each dip angle can be solved only by the two sets of deformation parameters when the bedding plane’s dip angles are 0° and 90°. ③By correcting parameters in the Mohr-Coulomb yield criterion by damage, the mechanical behavior of the specimens after failure can be predicted. research results has certain guiding significance for the experimental research, theoretical calculation and engineering construction based on layered rock mass.

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引用本文

赵东雷,左双英,王嵩,等. 层状岩体各向异性损伤模型及验证[J]. 科学技术与工程, 2019, 19(11): .
zhaodonglei,, and. Anisotropic Damage Model of Layered Rock Mass and Its Verification[J]. Science Technology and Engineering,2019,19(11).

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  • 收稿日期:2018-12-08
  • 最后修改日期:2019-01-07
  • 录用日期:2019-02-12
  • 在线发布日期: 2019-04-25
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