高等级沥青混凝土路面抗剪性能影响因素研究

摘要

Based on the multilayered elastic system theory and the GAMES software,considering the thickness of pavement structure courses,the stiffness and the interface condition,the paper analyzed the change law of anti-shear performance of the asphalt pavement.The results show that:the effect of the thickness of the surface course and the base course on the asphalt pavement is insignificant,so it is a waste of cost to increase the thickness of the surface course and the base course to enhance the shearing capability;the shear stress peak value in the surface course would be reduced by increasing the modulus of base course,but the change is not obvious,which indicates that it does little to promote the anti-shear performance by increasing the modulus of base course;the more the modulus ratio between the wearing course and the mid-course,the greater the shear stress peak value in the surface course,which can be ob-viously seen;the shear stress peak value in the surface course would be reduced by the decrease of inter-facial bonding performance.%运用多层弹性体系理论，以 GAMES 软件为力学分析工具，考虑路面结构层厚度、基面层模量及层间状态等因素，分析沥青路面抗剪性能的变化规律。结果表明：沥青路面剪应力峰值受面层厚度和基层厚度影响不明显，通过增加面层厚度和基层厚度提高路面抗剪性能加重了经济成本，收效甚微；面层内剪应力峰值随基层模量增加而减小，但变化不明显，说明增加基层模量对沥青路面抗剪性能的提高作用不大；上面层与中面层模量比越大，上面层内剪应力峰值越大，且这种影响较为明显；在层间粘结减弱的过程中，面层内最大剪应力峰值随之减小。