基于蠕变参数的沥青路面结构抗车辙性能评价

摘要

为了评价各种路面结构的抗车辙性能，建立基于蠕变参数的非线性有限元模型，对3种不同的中下面层沥青混合料路面结构进行车辙深度计算。结果表明：路面结构产生的车辙断面均呈现“W”形分布，车辙最大值出现在车轮轮迹正下方，由于中面层的横向迁移，两端产生了隆起变形。3种路面结构的车辙发展与沥青混合料的蠕变规律相符合，SBR沥青混合料作为中下面层的路面结构抗车辙性能最好，70＃沥青混合料路面结构的抗车辙性能最差。%In order to anti rutting performance evaluation of various pavement structure,establish the nonlinear finite element model of creep parameters based on rutting depth,were calculated for three different middle layer of asphalt mixture pavement structure.The results show that:the rutting of pave-ment structure produce section showed “W”shape distribution,rutting maximum appeared just below in the wheel track,because the lateral migration in the surface layer,both ends of the bulge deformation. Creep behavior of asphalt mixture and three kinds of pavement structure's rutting development is consist-ent.SBR asphalt mixture pavement structure layer as the anti rutting performance of the best.The anti rutting performance of 70#asphalt mixture pavement structure is the worst.