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为了更合理地模拟锚杆的实际工作状态,对全长粘结锚杆的工作状态进行了一定的假设,结合荷载传递分析方法和弹性力学Kelvin问题的解,推导出了剪应力沿锚杆长度分布的计算公式,由此可清楚地看出影响锚杆剪应力分布的各因素。结合算例讨论不同计算模型推导的锚杆剪应力分布特点。结果表明,推导出的剪应力计算公式符合大部分学者提出的锚杆工作规律,同时,与仅考虑轴力为恒定值所推导的计算公式对比,考虑了轴力分布作用后计算的剪应力最大值和分布范围都比较小,该计算公式可供锚杆的优化设计及进一步的研究参考。
In order to simulate the actual working condition of the bolt more reasonably, the working condition of the full-length bonded bolt is presumed. Combining with the load transfer analysis method and the solution of Kelvin problem of elastic mechanics, it is deduced that the shear stress along the length of the bolt Distribution of the formula, which can clearly see the impact of shear stress distribution of various factors. The characteristics of anchor shear stress distribution derived from different calculation models are discussed with examples. The results show that the deduced formula of shear stress accords with the working principle of anchor rod proposed by most scholars. At the same time, compared with the formula derived by considering only the constant axial force, the maximum shear stress calculated by the axial force distribution is considered The value and distribution range are relatively small, the formula can be used for the optimal design of anchor rod and further research reference.