节理岩体三维偶应力弹性理论

节理的存在使得岩体的力学特性十分复杂。偶应力理论考虑了介质内颗粒尺度的影响，它以具有一定尺度的微元体为研究对象，引进了偶应力及弯曲曲率的概念，从而考虑了弯曲效应对介质变形特性的影响，可以用来解决岩土工程中的地下洞室底鼓、顶板开裂及反倾向层状岩体的弯曲倾倒等弯曲变形及弯曲破坏问题。本文考虑了节理间距的影响，对节理岩体的空间间题提出了弹性偶应力理论并建立了有限元计算模式，最后通过算例说明用偶应力理论解决上述问题的有效性。

Three-dimensional Elastic Couple-stress Theory of Jointed Rock Masses

The mechanical characteristics of jointed rock masses are very complicated due to the existenceof joints. Because of considering the influence of medium pellet's dimension, and using the element withdefinite dimension as research object, the couple-stress theory introduces the concept of couple-stress andbending curvature and can be used to solve the problems such as the deformation or bending damage of thejointed or layered rock masses in slopes or tunnels. In this paper, three-dimensional elastic couple-stresstheory of jointed rock masses is proposed and the FEM model is constructed, and finally, the theory isdemonstrated to be effective for solving the above stated problems with a calculative example.