考虑车辆移动效应和超载的排水基层路面结构动力分析  

Dynamic Response Analysis of Asphalt Concrete Pavement with Permeable Base Considering Moving and Overload Effect of Vehicles

作　　者：欧金秋[1] 崔新壮[1] 王聪[1] 郑骁[1] 

机构地区：[1]山东大学土建与水利学院,济南市250061

出　　处：《公路》2011年第9期1-7,共7页Highway

基　　金：国家自然科学基金项目;项目编号51078222;50708056;山东省优秀中青年科学家科研奖励基金项目;项目编号2008BS09015;山东大学自主创新基金杰出青年培养项目;项目编号2010JQ001

摘　　要：为了研究车辆荷载作用下排水基层路面的动力响应,同时考虑车速和轴载的影响,采用移动加载的方法,对不同工况下沥青混凝土路面进行了快速Lagrange有限差分分析。结果表明,路面弯沉并未因排水基层的低模量而增大,峰值甚至有所减小;排水基层的存在减小了底基层底部的动应力,可以抑制反射裂缝的产生;弯沉及动应力均随车速的增大而减小,高温季节,低速行驶更容易引起大车辙;当车辆超载50%时,弯沉和动应力均成倍增大,导致路面产生较大变形甚至塑性破坏,且更容易引起路面开裂,表明治理超载对延长道路使用寿命、降低养护成本具有重要意义。In order to study the dynamic response of asphalt concrete pavement with permeable base under vehicle loads,based fast Lagrangian finite difference method,the dynamic analysis of asphalt concrete pavement under various conditions is conducted,considering the influence of moving vehicle load and different speed.The results show that the pavement dynamic deflection did not increase though the modulus of permeable base is low.The permeable base reduced the dynamic stress at the bottom of the subbase,which can inhibit the cracking of reflection.With the increase of speed,both the dynamic deflection and stress decreased,so in high temperature season,low-speed vehicle can cause larger rutting.Little vehicle overload can induce larger dynamic deflection and stress thus causes larger pavement deformation even plastic damage and the cracking.It is implied that the governance of overload is of great significance for extending road life and reducing maintenance costs.

关 键 词：道路工程 排水基层沥青混凝土路面 超载 动力响应 

分 类 号：U416.217[交通运输工程—道路与铁道工程]