车辆荷载作用下半刚性基层道路反射裂缝应力分析与处理

摘要

目的 为了提高半刚性基层道路的通行能力并延长其使用寿命,对该道路由车辆荷载引起的反射裂缝进行研究,并提出了合理的处理措施.方法 应用ABAQUS建立含有裂缝的复合路面有限元模型,分析路面结构中的应力、应变随车辆轴重的变化情况.然后对比分析设置与未设置防裂功能层两种情况下路面结构内的应力变化情况.结果 路面结构在增设了防裂功能层后的应力、应变均低于不设功能层时的数值,且下降幅度较为明显,在50％左右.结论 提出的处理措施可以有效地减少半刚性基层道路因车辆荷载引起的反射裂缝数量.%Reflection cracks caused by vehicle load is studied in this paper,to improve the traffic capacity,prolong the service life of the Semi-Rigid Base Road,and put forward measures accord it.The author established the finite element model of composite pavement with cracks by using the finite element software ABAQUS.This paper analyzed stress and strain of the pavement construction with the change of the vehicles' axle-weight.Then,the stress variation in the pavement structure was analyzed and compared in two cases of setting anti-crack function layer or not.After set up the anti-crack function layer,it has an obviously reduce of the stress and strain,about fifty percent lower than before.The treatment measure proposed by the author can effective reduce the reflection cracks caused by the vehicle loads.