在岩体工程的有限单元分析中,为描述节理、断层和断层带的不连续性质使用 Goodman等人提出的节理单元时,问题的解答具有不确定性.这是因为当节理面内的剪应力分量超出库伦摩擦条件所允许的极限值时,可以采用缩小剪应力分量τ,或增大正应力分量σ_n,或 In the finite element analysis of rock mass engineering, when the joint elements proposed by Goodman et al. are used to describe the discontinuous properties of joints, faults and fault zones, the solution to the problem is uncertain. This is because of the shear stress in the joint plane. When the component exceeds the limit value allowed by the Coulomb friction condition, the shear stress component τ may be reduced, or the normal stress component σ_n may be increased, or