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为研究车辆动载对设置应力吸收层复合式路面结构的影响,建立三维有限元模型,计算得到不同路面结构参数下路面结构的力学响应结果。基于灰色关联分析理论,定量分析了各结构层参数对沥青加铺层和应力吸收层底的等效应力σe、最大剪应力τmax、竖向剪应力τxy和水泥混凝土板接缝处弯沉差的影响程度。结果表明,水泥混凝土板厚度、沥青层模量、基层厚度和沥青层厚度为影响复合式路面动态响应的主要因素。并通过回归分析得到上述各力学指标的计算公式。
In order to study the influence of vehicle dynamic load on the composite pavement structure with stress absorption layer, a three-dimensional finite element model was established and the mechanical response of pavement structure under different pavement structure parameters was calculated. Based on the gray relational analysis theory, the equivalent stress σe, the maximum shear stress τmax, the vertical shear stress τxy and the deflection of the joints of asphalt concrete pavement and stress absorption layer are quantitatively analyzed. influence level. The results show that the main factors affecting the dynamic response of composite pavement are the thickness of concrete slab, asphalt layer modulus, base thickness and asphalt layer thickness. Through the regression analysis, the formulas of the above mechanics indexes are obtained.