利用复合单元技术,建立节理岩体喷锚支护的弹性模型。该模型可先不考虑节理、锚杆、喷层等细部结构,生成常规有限元网格,然后根据节理、锚杆、喷层的相关信息,形成复合单元网格信息。该模型可重点考虑锚杆和喷层在节理面上的局部化非线性变形与相互作用关系。算例研究验证了模型的合理性。该复合单元算法同时包含等效模拟和离散模拟的优点,有着较好的应用前景。 Using composite element technology, the elastic model of shotcrete and rock bolting in jointed rock mass is established. The model can generate general finite element grids without considering the detail structures such as joints, anchors and spray layers, and then form the grid information of composite units according to the related information of joints, anchors and spray layers. The model can focus on the localized nonlinear deformation and interaction of anchor and shotcrete on the joint surface. The case study verifies the rationality of the model. The composite unit algorithm contains both the advantages of equivalent simulation and discrete simulation, and has a good application prospect.