层状岩体各向异性损伤模型及验证  

Anisotropic Damage Model of Layered Rock Mass and Its Verification

作　　者：赵东雷 左双英[1] 王嵩 黄春 ZHAO Dong-lei;ZUO Shuang-ying;WANG Song;HUANG Chun(College of Resources and Environment Engineering, Guizhou University , Guiyang 550025, China;Guizhou Bureau of Geology and Mineral Engineering Investigation Institute 2nd , Zunyi 563099, China;Guizhou Province Architectural Research & Design Institute , Guiyang 550081, China)

机构地区：[1]贵州大学资源与环境工程学院,贵阳550025 [2]贵州省地矿局第二工程勘察院,遵义563099 [3]贵州省建筑设计研究院,贵阳550081

出　　处：《科学技术与工程》2019年第11期254-261,共8页Science Technology and Engineering

基　　金：国家自然科学基金(51469007);贵州省土木工程一流学科(QYNYL[2017]0013);贵州省山地地质灾害防治工程技术研究中心(黔科合平台人才[2017]5402号);贵州省科学技术厅社会发展科技攻关项目(黔科合支撑[2017]2866)资助

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。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.

关 键 词：岩石力学 层状岩体 岩石损伤 本构模型 数值试验 

分 类 号：TU45[建筑科学—岩土工程]