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建立了半刚性沥青路面和柔性沥青路面的三维有限元模型,采用非线性粘弹塑性理论分析了不同交通荷载对沥青路面车辙变形和切应力的影响,并考虑了刹车、路面纵坡对路面车辙的影响。结果表明:在相同荷载作用下,两种路面结构的车辙变形和切应力分布随着路面深度呈非线性分布,但不同路面结构对交通荷载变化的敏感性存在较大的差异;不同的胎压、轮载以及刹车产生的水平力对路面车辙变形有着较大的影响。当胎压为1 050 kPa及轮载为62.5 kN时,路面产生的车辙都大于在标准荷载及标准胎压时路面产生的车辙;在坡度为1%～6%时,路面纵坡对沥青路面车辙深度的影响不明显;在坡道上行车(特别是下行)时刹车是路面车辙过大的主要原因。
The three-dimensional finite element model of semi-rigid asphalt pavement and flexible asphalt pavement is established. The nonlinear viscoelastic-plastic theory is used to analyze the influence of different traffic loads on the rutting deformation and shear stress of asphalt pavement. Considering the influence of braking and longitudinal grading on pavement rutting Impact. The results show that under the same load, the distributions of rutting deformation and shear stress of the two pavement structures are non-linear with the depth of pavement, but the sensitivity of different pavement structures to traffic load changes is quite different. Different tire pressures , The wheel load and the horizontal force generated by the brake have a greater impact on the road surface rut deformation. When the tire pressure is 1 050 kPa and the wheel load is 62.5 kN, the rut generated by the road surface is greater than the rut generated by the road surface at standard load and standard tire pressure. When the slope is 1% ~ 6% The effect of rutting depth is not obvious. Braking is the main reason for excessive rutting on pavement when driving on a ramp (especially downhill).