【摘要】 通过有限元方法对不同工况下长大纵坡沥青路面的应力峰值进行了计算,同时对车辆匀速行驶和变速行驶时纵坡沥青路面的应力进行了对比,结果表明应力随坡度的变化呈良好的线性关系;在超载情形下,各项应力均显著上升;长大纵坡沥青路面各应力峰值随着深度的增加而减小,其最大值位于上、中面层之间;车辆的变速、超载、重载对长大纵坡沥青路面破坏极为严重.更多还原

【Abstract】 Rutting and slippage are serious problems for asphalt pavement on large longitudinal slope.Model of the large longitudinal slope is built by finite element method,and is used to calculate the maximal stresses under different situation.At the same time,the pavement stress when vehicle runs at a constant speed is compared with that when vehicle shifts.Then the relationships of stresses versus slope angle,load and pavement depth are separately elicited.The results indicate that stress keeps a good linear relationship with slope angles.All kinds of stresses increase dramatically when the pavement is under over loading.Extreme damages to the longitudinal slope of pavement arise due to the vehicle accelerating and decreased velocity.更多还原