移动荷载作用下饱和沥青路面响应探析

我国高速公路广泛采用沥青混凝土路面结构,其使用性能除了与本身材料和结构相关外,还受外界环境如温度、水等影响.基于多孔介质理论,采用大型有限元分析软件ABAQUS模拟饱和沥青路面在移动荷载作用下的动力响应,分析了不同速度、荷载作用下路面结构的应力、应变及孔隙水压力变化规律.分析结果表明,随着车速的增加,路面结构内部承受的应力逐渐减小,孔隙水压力则较快速的增长,对路面不利影响逐渐增大；随着荷载的增大,路面结构内部承受的应力以及孔隙水压力均呈线性增长.该研究可为认识沥青路面水损害和防范水损害提供理论指导.

Response Analysis of Saturated Asphalt Pavement under Action of Moving Load

Asphalt concrete pavement structure is used widely in highway of china.The using performance of concrete pavement is not only related to the materials and structure,but also impacted by the external environment such as temperature,water,etc.Based on the theory of porous media,this article simulates the dynamic response of asphalt pavement under moving load by using finite element analysis software ABAQUS and analyzes variation discipline of the pavement structure stress,strain and pore pressure under different speeds and loads.The results show that as the speed of motor vehicle increases,the inner stress of pavement structure decreases gradually,pore pressure grows rapidly,which will gradually increase the adverse effects to asphalt pavement;the inner stress of pavement structure and pore pressure show a linear growth as the load increases.The study can provide theoretical guidance for understanding water damage and the prevention of water damage in asphalt pavement.