级配碎石沥青路面倒装结构力学响应分析

倒装结构中,级配碎石层由下基层变成上基层,引起受力状态明显变化,分析和了解此变化规律有助于优化路面设计.现采用ABAQUS建立动载下不同沥青路面结构的有限元模型,分析路面在不同结构参数下的力学响应.结果 表明:与半刚性基层路面相比,倒装结构能够适当发挥材料的特性,有效防止反射裂缝;但弯沉较大,且容易产生Top-Down...

Mechanical Response Analysis of Inverted Structure of Graded Aggregate Asphalt Pavement

The change of the graded gravel layer in inverted structure from the lower base to the upper base,can cause significant changes in the stress state.Analyzing and understanding this change rule is helpful to optimize the road surface design.The paper used ABAQUS to establish finite element models of different asphalt pavement structures under dynamic load,and analyzed the mechanical response of the pavement to different structural parameters.The results showed that:compared with semi-rigid base pavement,the inverted structure could properly exert the characteristics of the material and effectively prevent reflective cracking.However,the deflection was large and Top-Down cracks were easily generated,and the fatigue life was short,which could be improved by changing the thickness and modulus of each structural layer.