沥青路面连续变温温度场模拟分析

Simulation Analysis on Temperature Field of Asphalt Pavement with Consecutive Temperature Variation

为给沥青路面车辙模拟计算提供准确的路面温度场,根据多年统计平均气象条件,借助大型有限元软件ABAQUS,自编用户子程序,建立连续变温条件下的沥青路面温度场有限元模型。根据实测路面温度场验证了温度场模型的可靠性,分析了连续变温条件下路面温度场随路面深度及时间的变化规律。结果表明:沥青路面结构上部温度随路面深度有明显变化,而随着深度的增加,变化逐渐减弱,路面结构对环境温度变化具有消减作用;沥青路面,尤其是面层,在环境条件作用下,其温度随时间呈现周期性变化,并随深度呈现滞后性响应。

In order to provide accurate temperature field of asphalt pavement for rutting simulation,the finite element model of temperature field with consecutive temperature variation is established by means of user subroutine of finite element software ABAQUS,according to statistical average weather conditions in many years.According to the measured temperature field,the reliability of the temperature field model is verified,and temperature field variation with pavement depth and time is analyzed under conditions of consecutive temperature variation.The results show that the upper asphalt pavement＇s temperature changes significantly with pavement depth,whereas the temperature variation gradually weakens with increasing depth,which indicates that pavement structure can relieve the variation of ambient temperature;temperature field of asphalt pavement,especially surface layer,varies periodically with time under ambient conditions,and lags behind with pavement depth.