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为了进一步揭示全长粘结型锚杆的工作机理及影响因素在理想弹塑性模型和摩尔库伦屈服准则条件下,利用有限差分法软件FLAC-2D模拟单根锚杆在混凝土试块上的拉拔试验,得到拉拔力与位移的关系曲线。通过参数分析,在合理的取值范围内增加锚固深度、锚杆直径、围压可以显著提高极限拉拔力。网格划分不影响极限拉拔力但对计算时间和过程精度有影响,同时探讨了全长粘结锚杆的受力机理和破坏方式。
In order to further reveal the working mechanism and influencing factors of full-length bonded anchor under the conditions of ideal elastic-plastic model and Mohr-Coulomb yield criterion, the finite difference method software FLAC-2D was used to simulate the drawing of single anchor on concrete block Test, get the pull force and displacement curve. Through parameter analysis, increasing the anchorage depth, bolt diameter and confining pressure within a reasonable range can significantly increase the ultimate pullout force. The meshing does not affect the ultimate pullout force but has an impact on the calculation time and process accuracy. Meanwhile, the stress mechanism and failure mode of the full-length bonded anchor rod are discussed.