Mechanical analysis and simulation of in-situ deformation test of columnar jointed rock mass
Mechanical analysis and simulation of in-situ deformation test of columnar jointed rock mass
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发表时间：
2012
影响因子：
1.5
通讯作者：
Di Shengjie;Xu Wei-ya;Wang Wei;Wu Guan-ye
中科院分区：
文献类型：
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作者：
Di Shengjie;Xu Wei-ya;Wang Wei;Wu Guan-ye
根据白鹤滩坝区柱状节理岩体的现场变形试验结果，讨论了节理刚度取值问题，利用柔性中心孔变形试验数据，得到了柱状节理刚度取值，分析了岩石单一概念模型的变形规律和变形特性，认为岩石变形由岩石和节理两部分组成，其滞回性能取决于节点的受力性能，推导出的变形公式可以计算多个不同厚度的混凝土的等效弹性模量。建立了柱状节理岩体的随机模型，采用离散元法对岩体进行了数值模拟，并对节理岩体的各向异性特征进行了描述。反算刚度，得到的等效变形参数在试验结果范围内。
The value of joint stiffness based on in-situ deformation experimental results of columnar jointed rock mass in Baihetan dam region was discussed.The value of columnar joint stiffness is obtained by using experimental data of flexible central hole deformation test.The regulation and deformation properties of rock single concept model are analyzed.Rock deformation is made up of two parts,one of rock and one of rock joint,and its hysteretic properties are determined by joints' mechanical behavior.Moreover,the formula of deformation deduced can calculate the equivalent elastic modulus of multi-set intersection joint rock and describe the anisotropic characteristics of jointed rock.A random model of columnar jointed rock mass is established.The rock mass is stimulated by using discrete element method and the stiffness of reverse calculation;and equivalent deformation parameters obtained are in the range of test results.