环境温度及荷载对沥青路面车辙发展的影响性分析

Impact of Environment Temperature and Vehicle Loading on Rutting Development in Asphalt Concrete Pavement

为研究温度及车辆荷载对沥青路面车辙发展的影响效果,采用ABAQUS有限元软件建立分析模型,结合气温观测数据,分析路面内部温度场变化规律,在此基础上分析沥青路面车辙在不同温度及车辆荷载下的变化规律。研究结果表明:沥青路面车辙发展随外界温度的变化呈非线性规律性变化;高温条件下车辙发展速度远大于低温条件下的发展速度;相同荷载作用次数条件下,车辙深度与荷载大小线性相关;对于同样的荷载增长幅度,较低温度下车辙的增长幅度更大,但高温条件下车辙深度增长绝对值则更大。因此,在材料设计过程中,必须着重关注高温条件下沥青混凝土的抗车辙性能;在路面使用过程中,应尽量控制超载现象的发生,防止车辙快速发展,延长路面使用寿命。

In order to investigate the effect of environment temperature and vehicle loading on the asphalt pavement rutting development,a 3D model of pavement structure was built by utilizing ABAQUS.In combination with observed temperature data,the temperature variation law in pavement was analysed.On this basis,the asphalt pavement rutting developments under different vehicle loadings at different environment temperatures were analyzed.The results indicate that（1） the rutting develops nonlinearly as the environment temperature varies;（2） the rutting developing rate under high temperature condition is much higher than that under low temperature condition;（3） there is a linear correlation between rut depth and vehicle loading under the same loading times;（4） rutting increases more under low temperature condition than under high temperature condition with the same loading increment,however,the absolute increasing value of rut depth is larger at high temperatures.Therefore,the asphalt concrete anti-rutting performance at high-temperatures should be paid more attention in the material design,and the over-loading condition should be in good control so as to avoid the development of rutting disease.By this way,the pavement service life can be extended.