An analytical model is developed to simulate the load-displacement performance of rock bolts under axial loading based on Modified Continuously Yielding Criterion. Such a model accounts for various surface geometries of rock bolt as well as the various confining pressures at the rock bolt to the grout interface which play significant roles in the behaviour of grouted rock bolts under axial loading. Majority of the defined parameters in the model can be measured within the laboratory environment. The proposed model is validated against the experimental results obtained from FRP and HA25 rock bolts. The good agreement between the experimental results and the analytical predictions highlights the ability of the proposed model to simulate the full load-displacement behaviour of rock bolts under axial loading.

建立了基于修正连续屈服准则的岩体锚杆在轴向荷载作用下的位移-位移性能分析模型。这种模型考虑了锚杆的各种表面几何形状以及锚杆到灌浆界面的各种约束压力，这些压力在轴向载荷下对灌浆的锚杆的性能起着重要作用。可以在实验室环境中测量模型中大多数已定义参数。相对于从FRP和HA25岩石锚杆获得的实验结果验证了所提出的模型。实验结果与分析预测之间的良好一致性突显了所提模型模拟轴向载荷下岩石锚杆全负荷位移特性的能力。