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.
出处
《公路》
北大核心
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
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
asphalt concrete pavement
moisture damage
finite element method
pore press
water-loading coupling
