两种典型沥青混凝土路面结构沥青层饱水状态动力响应三维有限元分析  

Dynamic Response Analysis with 3D Finite Element Method for Two Typical Kinds of Asphalt Concrete Pavements with Saturated Asphalt Layer

作　　者：任瑞波[1] 祁文洋[1] 徐强[1] 

机构地区：[1]山东建筑大学土木工程学院,济南市250101

出　　处：《公路》2011年第2期1-5,共5页Highway

基　　金：山东省自然科学基金项目;项目编号ZR2009FM010

摘　　要：水和动态荷载耦合作用是沥青混凝土路面发生水损害的主要原因。首先基于多孔介质理论,假定路面结构中的沥青混凝土材料为完全饱水的多孔介质材料,对两种典型路面结构———半刚性沥青混凝土路面、具有柔性基层的半刚性沥青混凝土路面分别建立了三维有限元模型;而后对比分析了两种路面结构在动态荷载作用下的竖向应力、竖向应变、孔隙水压力的空间分布情况以及时程变化规律。结果表明:具有柔性基层的半刚性沥青混凝土路面结构具有较好的抗水损害性能,半刚性沥青混凝土路面结构则表现出较差的抗水损害性能。The coupled moisture-loading action is the primary factor of initial failure for asphalt concrete pavement.At first,based on the porous media theory,assuming the asphalt concrete as saturated porous media material,two three-dimensional finite element models are established for two typical kinds of asphalt concrete pavements which included the semi-rigid base asphalt concrete pavement,the semi-rigid base asphalt concrete pavement with flexible base.Then the comparison and analysis of the spatial distribution and time change regulation for asphalt concrete pavement between the two kinds of structures are carried out which included vertical stress,vertical strain,and pore pressure.The result indicates that the semi-rigid asphalt concrete pavement stucture with flexible base shows the best performance of resisting the moisture damage,relatively the semi-rigid asphalt pavement structure gives the worse performance.

关 键 词：沥青混凝土路面 水损害 有限元 孔隙水压力 水-荷载耦合作用 

分 类 号：U416.217[交通运输工程—道路与铁道工程]