【摘要】 分析沥青混合料应力吸收层在含有裂缝的半刚性基层复合式路面中的受力状况,对于选择应力吸收层材料和设计道路结构具有指导意义。采用有限元分析方法,建立含应力吸收层沥青路面有限元模型,分析轴载和模量变化对应力吸收层结构的应力影响。结果表明:应力吸收层处于应力极为复杂的位置,尤其是处于裂缝处应力吸收层层底应力集中现象明显,随着应力吸收层模量在一定范围内的提高,能够缓解应力集中现象;随着轴载增大,应力吸收层层底应力明显增加,道路使用寿命降低。更多还原

【Abstract】 The analysis on the stress situation of stress absorbing layer of asphalt mix in the semi-rigid composite pavement that contains cracks has important significance for the selection of stress absorbing layer materials and road structure design. In this paper,a finite element model was established based on the stress absorbing layer in asphalt pavement by finite element analysis method,and the influence of axle load and the modulus of stress absorbing layer on the loading stress of stress absorbing layer was analyzed. The results indicated that the stress absorbing layer was in the position where the stress was extremely complex. The stress concentration was especially obvious on the bottom of the absorbing layer at the cracks. With the increase of the modulus of stress absorbing layer within a certain range,the stress concentration can be relieved. With the increase of axle load,the stress on the bottom of stress absorbing layer increased significantly and the life of the road reduced.更多还原