Analysis of the Major Factors Influencing the Mechanical Response of Asphalt Pavements at Intersections in High Temperature and Rainy Regions

Focusing on the environment and loading of the asphalt pavement at intersections in high-temperature and rainy regions, a finite element model is established considering the modulus decrease. Orthogonal test is applied to calculate the asphalt pavement mechanical response under different temperatures, water conditions, horizontal force levels, overloading rates, and interlayer bonding conditions. Statistical analysis is conducted to evaluate the impact of the factors on the mechanical response while the strength reduction of the materials under different environments is considered. The result shows that temperature, water condition, and horizontal force are the major factors influencing the mechanical response at the damage-prone position of the asphalt pavement at the intersection area in high-temperature and rainy regions. Among them, the horizontal force is the most significant factor at the shallow layers. The influence of overloading is slight and shows no obvious differences at each layer. The influence of interlayer bonding increases with depth and becomes significant and obvious only at the position where the interlayer bonding is poor.