Theoretical Research of the Dynamic Response of Asphalt Pavement Structure Under Traffic Loads

TLDR: In this article, the authors established the dynamics model of visco-elastic layer system under moving load and analyzed the dynamic responses of four kinds of typical asphalt pavement structure,namely, the thick semi-rigid, the improved semirigid, inverted pavement and the full depth pavement structure.

Abstract: This paper establishes the dynamics model of visco-elastic layer system under moving load.The dynamic responses of four kinds of typical asphalt pavement structure,namely,the thick semi-rigid,the improved semi-rigid,the inverted pavement and the full depth pavement structure,are analysed under the standard load and the 100% overloading condition to study the various differences between the pavement structures.Results show that the life of pavement structure is more seriously affected by the surface bottom shear strain.The shear strain of the semi-rigid pavement structure at the bottom of surface layer is high,which may easily lead to premature failure.The cost of the full depth pavement structure is expensive.The various dynamic response indicators of the inverted pavement structure is lower,especially when this structure uses flexible base and semirigid structure.This structure can not only make drainage easy,but get rich experience of construction,so it is a more suitable pavement structure of heavy-load traffic highway.