Asphalt Pavement Structure Of Three-dimensional Finite Element Analysis

With sustained and rapid domestic economy development, science and technology's improvement, advanced asphalt pavement is more widely used. Followed by the vehicle overloading, speeding and other issues become more and more serious, then early damage of asphalt pavement is getting more and more serious.By using ANSYS finite element program, selecting a semi-rigid asphalt pavement typical structure to establish three-dimensional finite element model, calculated the asphalt pavement in the static load of the mechanical response, analyzed and discuss longitudinal road, overloading, the level of power and turn Ultra-high in detail. The paper adopts linear elastic constitutive relations on the asphalt road surface, grass-root-based and land-based, and ANSYS software in the classic Drucker-Prager yield destroy criterion is used land-based, calculating the asphalt pavement in various Longitudinal, different rates of overloading, factors of different levels of power and turn ultra-high deflection of the circumstances, different surface depth of maximum shear stress, tensile stress at the end of the structure of layers of strain and pressure the largest land-based emergency response to the mechanics.In fact, asphalt pavement structure is under the effect of moving load, so the paper intends to build a three-dimensional model of road structure, in order to study dynamic response in the actual movement of loads, analyze the stress characteristics in the mobile load of dynamic load, and to explore the role of vehicle brake in response to the road.After the foregoing analysis, the paper collects asphalt pavement engineering measured data and disease investigate results, and compares them with analysis results in this article. Moreover, it is better to explain the early damage phenomenon of asphalt road type surface. finally, for the reasons of asphalt pavement destruction, the paper develops some asphalt pavement design suggestions, and recommends some reasonable asphalt pavement structure program.