考虑摩擦接触的沥青路面坑槽补缝处力学响应研究  

Study on the Mechanical Response of Asphalt Pavement Potholes Considering the Frictional Contact in the Joints

作　　者：张倩[1] 李泽[1] 温志广 杨永红 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]包头市交通运输局,包头014030

出　　处：《武汉理工大学学报（交通科学与工程版）》2015年第3期510-514,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：内蒙古自治区交通运输科技项目(批准号:NJ-2014-23);河北省交通科技项目(批准号:Y-2010090);陕西省教育厅专项科研计划项目(批准号:12JK0795)资助

摘　　要：为了给沥青路面坑槽结构修补设计提供科学的理论支持,针对坑槽补缝处力学响应的影响因素修补厚度和修补料与原路面材料的模量比,采用Goodman零厚度单元模型,运用非线性有限元软件ABAQUS计算了不同修补厚度、不同模量比与荷载耦合作用下补缝处的力学响应,分析了补缝处力学指标随接触摩擦系数的变化规律.研究结果表明:不同接触模型对补缝最大拉应力和最大剪应力计算结果影响较大;不同修补厚度和模量比条件下,横缝最大拉应力无显著变化;而纵缝处,一定修补厚度和模量比条件下最大拉应力出现峰值,且由顶部到底部呈先减小后增大趋势,各补缝处最大剪应力关系是纵缝顶部>补块表面>橫缝底部,模量比为0.5时出现峰值0.32MPa.This paper aims at providing more scientifically theoretical support for repairing design of as‐phalt pavement potholes .Repairing depth and the modulus ratio between repair material and the origi‐nal pavement material are two important factors affecting mechanical response in pothole joints .In or‐der to unveil the relationship between the mechanical properties and contact friction coefficients at the joints ,Goodman element model of zero thickness in nonlinear finite element software ABAQUS is in‐troduced to simulate mechanical response under different repairing thickness ,different modulus ratio and load combination .It is found that contact model has a great impact on the calculation results of the maximum tensile stresses and the maximum shear stresses at joints .The maximum tensile stress of transverse joints does not change greatly under different repairing thickness and modulus ratio con‐ditions in each contact model .But for longitudinal joints ,tensile stress exhibits a peak value .It first decreases and then increases from top to bottom of the joint .Shear stress show s a peak value at the top of longitudinal joints and the lowest value at the bottom of transverse joints .It reaches its highest value ,0 .32M Pa ,w hen the modulus ratio is 0 .5 .The mechanical analysis results can guide the selec‐tion of repairing material and the design of pothole fill .

关 键 词：道路工程 接触摩擦系数 Goodman模型 模量比 修补厚度 坑槽修补 力学响应 

分 类 号：U416.217[交通运输工程—道路与铁道工程]