沥青路面材料热物性参数对温度场的影响及敏感性分析  

Impact of Asphalt Pavement Thermophysical Property on Temperature Field and Sensitivity Analysis

作　　者：冯德成[1] 胡伟超[1] 于飞[1] 曹鹏[1] 张鑫[1] 

机构地区：[1]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090

出　　处：《公路交通科技》2011年第11期12-19,共8页Journal of Highway and Transportation Research and Development

基　　金：交通部西部交通建设科技项目(200631800043);教育部留学回国人员科研启动基金资助项目(01314302)

摘　　要：为研究沥青路面主动控制温度场技术的可行性,应用ABAQUS有限元软件建立了沥青路面温度场有限元计算模型,并通过实测验证了模型的精度。计算了夏季高温条件下,上面层材料导热系数、吸收率、比热容和发射率4个因素对路面各结构层的高温状况的影响规律。特别针对车辙问题,探讨了各因素对中面层日最高温度的影响。研究结果表明,上面层材料的热物参数对路面结构温度场影响显著。沥青路面温度场的敏感性分析结果显示,对中面层日最高温度影响程度从大到小依次为:吸收率、导热系数、发射率以及比热容。可以通过改变材料的热物性质实现路面温度场的主动控制,并为新材料的选择设计以及确定结构层热物参数合理分布提供了理论依据。To study the feasibility of active controlling asphalt pavement temperature field,a finite element model of pavement temperature field was developed with ABAQUS finite element software,which was validated by data from actual measurement.The regularity of influence of thermal conductivity,absorption rate,specific heat capacity and emissivity of the top layer on high temperature status in hot summer was calculated.Specifically for the rutting due to high temperature,the effect of various factors on the daily maximum temperature of intermediate layer was studied.The results show that thermalphysical parameters of the top layer have great influence on the temperature field of pavement structure.The sensitivity analysis shows that the absorption rate has the greatest impact on the daily maximum temperature of intermediate layer,followed by thermal conductivity,emissivity and specific heat capacity.It is feasible to control pavement temperature field actively by improving thermophysical properties of materials.The research provided a theoretical basis for the development of new materials with good thermal property and for determining reasonable distribution of the thermal parameters.

关 键 词：道路工程 沥青路面 有限元 温度场 热物性质 敏感度 车辙 

分 类 号：U416.217.01[交通运输工程—道路与铁道工程]