暴雨温度骤降下沥青路面有限元分析

The Finite Element Analysis of Asphalt Pavement Under Rainstorm Temperature Dips

基于热弹性层状理论,采用ANSYS建立沥青路面三维有限元模型,对暴雨温度骤降情况下沥青路面温度作用和荷载作用进行耦合分析,研究该环境影响下沥青路面力学响应规律的变化,并将结果与高温作用下沥青路面响应规律比较.结果表明沥青路面结构在受到暴雨作用温度骤降情况下,沥青路面竖向变形值、竖向压应力变小;沥青路面路表由压应力变为拉应力,并使沥青层层底拉应力减小;暴雨骤降使沥青路面最大剪应力增大.

Based on the thermal elastic layered theory and using ANSYS to establish the three-dimensional finite element model of asphalt pavement, coupled analysis on the temperature of asphalt pavement and load effect caused by storm and temperature drop is done. The changes of asphalt pavement under the influence of the environment are studied, and the result is compared with high temperature response of asphalt pavement. The results show that when the asphalt pavement structure subjects to heavy rain which causes the sharpdrop of the temperature,the vertical deformation and vertical stress become smaller; asphalt road surface by the compressive stress becomes tensile stress; the bottom layers of asphalt become small; asphalt pavement maximum shear stress increases.