Dynamic Response Analysis Of Transversely Isotropic Asphalt Pavement Under Tire Loading

The Specifications for Design of Highway Asphalt Pavement implemented in China adopts the double circular uniform static vertical load to assume the driving load on the road surface,and it can not simulate the vehicle load with non-uniform characteristics and reflect its influence on the road surface.The roadbed pavement materials have obvious anisotropy due to the synthetic of the material and the formation of the structure,and the mechanical response of the pavement structure under different loads is different.As a specific anisotropic characterization,the transverse performance of the isotropic performance guarantees a more efficient and accurate calculation method and can better characterize the behavior of the pavement structure.This paper uses the method of finite element numerical analysis,mainly from the following aspects:(1)Based on the finite element model of ABAQUS simulated radial tire,the grounding stress distribution of the tire under static load is analyzed by simulating the contact process of the radial tire with the rigid body under vertical load.Then,in the above basically,the author simulate the three different working conditions of radial tire rolling.The author analyzes the distribution law of contact stress between tire and road surface under each working condition,and the grounding performance of tire pavement under different influencing factors.(2)This paper establish a three-dimensional finite element model of transversely isotropic pavement structure,and this paper study the influence law of dynamic response of transversely isotropic surface asphalt pavement under non-uniform moving tire load during free rolling.A comparative analysis of the effects of transverse isotropy on pavement performance reveals that the current norms are dangerous.(3)A comparative study of the mechanical response of key points within the pavement structure under braking conditions and free rolling conditions will be proceed.The stress response,strain response and dynamic response of the pavement are analyzed under two typical conditions.It is found that the braking condition has a significant influence on the horizontal response of the pavement layer.