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为了研究不同修补厚度对沥青混凝土路面坑槽补缝界面处力学指标变化规律的影响,采用Goodman零厚度摩擦接触单元模型,计算不同厚度条件下各补缝界面最大拉应力和最大剪应力,探讨各补缝界面力学指标随摩擦系数的变化规律。研究表明:不同接触模型对补缝最大拉应力和最大剪应力计算结果影响较大,当μ<0.8时,各补缝界面最大拉应力随摩擦系数减小而非线性急剧增大;不同修补厚度条件下,最大拉应力峰值0.32 MPa和最大剪应力峰值0.29 MPa均出现在4cm纵缝顶部。研究成果为解释不同修补厚度条件下的破坏机制提供力学依据,旨在为修补材料选择和修补结构设计提供参考。
In order to study the effect of different repaired thickness on the mechanical properties of asphalt pavement pit interface, the Goodman zero-thickness tribological contact element model was used to calculate the maximum tensile stress and the maximum shear stress of the pavement joints under different thickness conditions. Variation of Mechanical Index of Filling Seam Interface with Friction Coefficient. The results show that different contact models have a great influence on the calculation results of maximum tensile stress and maximum shear stress. When μ <0.8, the maximum tensile stress decreases with the decrease of friction coefficient but increases nonlinearly. When different thickness Under the conditions, the maximum tensile stress of 0.32 MPa and the maximum shear stress of 0.29 MPa peak appear in the top 4cm longitudinal seam. The research results provide a mechanical basis for explaining the failure mechanism under different repair thickness conditions, and provide reference for the selection of repaired materials and the repair of structural design.