【摘要】 本文把被多组定向节理所切割的岩体视为各异向性的连续弹塑性体,探讨了其应力应变关系。文中考虑了节理刚度和产状对岩体变形特性的影响,给出了以常规岩石力学试验资料表示的节理岩体各向异性弹性矩阵的计算公式;考虑了节理岩体一般均沿节理面受拉开裂或剪切滑移的定向破坏特点,将塑性流动理论用于节理岩体的有限元分析。最后,编制了平面问题的非线性有限元程序,分析了坝基内含有两组节理的重力坝的坝基应力和屈服区。更多还原

【Abstract】 This article assumes the rock mass cut by multiple sets of directional jointsas an anisotropic continuum with elastoplastic nature and discusses the stress-strain relationship of the rock mass. The formula for anisotropic elastic matrix of the rock mass is given, in which the influence of stiffness and occurrence of the joints to deformability of the rock mass is consideredand only the data of normal tests of rock mechanics are necessary. According to the character that the failures (tensile fission and shear slip) in the rock mass usually happen directionally along a set of joints, the plastic yield theory is brought into the analysis of the rock mass. Finally, the programmeof the non-linear finite element method for plane problem based on this calculated model is compiled, and an example illustrating the stresses and yield zone in the rock foundation of a gravity dam with two sets of joints is analyzed.更多还原