喷锚支护节理岩体的弹性复合单元模型

Elastic composite element model for jointed rock masses supported by shotcrete lining and anchor bolt

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。

Elastic model for jointed rock masses supported by shotcrete lining and anchor bolt is established by composite element technique. In this model, general finite element mesh can be generated without considering the existence of joint, anchor bolt and shotcrete lining; then composite element information can be formed according to the relevant information of them. The localized nonlinear deformation and interactive relationship of anchor bolt and shotcrete lining on joint can be mainly considered in the model. Then numerical example is given to verify the rationality of the model. This composite element algorithm includes the advantages of equivalent simulation and discrete simulation and will be of good application prospects.