随机荷载作用下沥青路面力学响应分析

Analysis on mechanical response of asphalt pavement under random load

探讨了车辆随机动载对半刚性沥青路面的影响,以动力学基本理论为基础,建立路面结构的三维有限元模型,根据路面不平度模拟作用在路面上的随机荷载,概述了三种模拟随机荷载的方法,分析了车速对随机荷载作用下路面的各力学性能指标的影响。结果表明,车辆行驶速度提高,沥青路面表面层的最大竖向位移、最大垂直压应力、最大剪应力、最大横向拉应力、最大水平拉应力均逐渐减小。

The effect of vehicle random dynamic load on the semi- rigid asphalt pavement is discussed in this paper.Based on the theory of dynamics,the three- dimensional finite element model of pavement structure is established,and according to the random load of the different road surface roughness,three methods of simulating stochastic load are summarized,and the influence of vehicle speed on the mechanical properties of pavement under random load is analyzed.The results show that with the increase of vehicle speed,the maximum vertical displacement,the maximum vertical compressive stress,the maximum shear stress,the maximum transverse tensile stress and the maximum tensile stress of the pavement structure are gradually decreased.