基于Abaqus蠕变本构的重载路面车辙分析

Analysis of Rutting in Heavily Loaded Pavement Based on Abaqus Creep Constitutive

车辙是高温地区半刚性基层沥青混凝土路面典型破坏形式之一。重载交通以及重载交通下车辆的行驶速度对路面永久变形有一定的影响。采用大型商用有限元软件Abaqus,分析在高温重载条件下,车辙产生过程中沥青混凝土面层蠕变的发展规律,并比较重载交通下车辆的行驶速度对于路面车辙的影响。结果表明,重载交通对路面的永久变形影响明显,车辙深度随轴重的增加而增加。同时,随着累计荷载作用次数的增多,前期的路面变形发展较快,后期逐渐趋于稳定。随着重载交通下车辆的行驶速度的加快,路面车辙呈减小的趋势,与荷载的影响程度相比,行驶速度对于车辙的影响较小,但不容忽视。

Rutting is one of the typical failure modes of semi-rigid base asphalt concrete pavement in high temperature areas. Heavily loaded traffic and heavy load driving speed have a certain impact on the permanent deformation of the pavement. The development pattern of creep in asphalt concrete pavement in the rutting process under condition of high temperature and heavy load is analyzed with large commercial finite element software Abaqus and the influences of heavy load driving speed on rutting in pavement are compared. The results show that heavy load has a significant effect on the permanent deformation of the pavement,and the rutting depth increases with the increase of the axle load. With the increase of the cumulative load,the deformation of the pavement tends to become stable. With increasing number of the speed under heavy load,the rutting in pavement decreases,and the impact of driving speed on the rutting is smaller than the load,but it can＇t be ignored.