热—结构耦合作用下沥青路面动态弯沉温度修正研究  

The Study of Dynamic Deflection Temperature Correction of Asphalt Pavement under Effect of Thermal-structure Coupling Field

作　　者：郑元勋[1] 杨培冰 

机构地区：[1]郑州大学水利与环境学院交通系,郑州河南450001

出　　处：《郑州大学学报（工学版）》2014年第2期1-5,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：中国博士后面上基金资助项目(79439);港口海岸及近海工程国家重点实验室开放基金(LP1113)

摘　　要：为了研究沥青路面温度对路面弯沉的影响,考虑道路材料参数的温度敏感性,建立沥青路面有限元耦合模型.基于所建数值模型,分析了FWD动态加载作用下路面弯沉在不同温度条件下的变化情况,以及不同厚度沥青路面最大弯沉受温度的影响.同时分析了沥青路面结构及材料参数对动态弯沉温度修正系数的影响,最后基于耦合模型对沥青路面动态弯沉温度修正系数进行了研究,并与试验结果进行了对比.研究表明,路面厚度及基层模量对温度修正系数影响较大,基于有限元模型建立的沥青路面弯沉的温度修正系数与通过试验研究建立的温度修正系数吻合程度较高,可以作为试验研究的有效补充.In order to study the effect of asphalt pavement temperature on pavement deflection,the 3D thermal -structural coupling finite element model was established in consideration of function relation between asphalt pavement material parameters such as pavement modulus,temperature shrinkage coefficient,Poisson＇s ratio and pavement temperature.On the basis of this model,the changing regularity of pavement deflection under FWD dynamic loading in different temperature conditions of pavement and the temperature effect on maximum deflection of different thickness of asphalt pavement were researched.At the same time,the influence of asphalt pavement structure and material parameters on the dynamic deflection temperature correction coefficients were analyzed.Finally,deflection temperature correction coefficient of asphalt pavement was studied based on the coupled model,and the comparison with the experiment results was also done.Research shows that,the pavement thickness and modulus of base are important influence factors on the temperature correction of asphalt pavement deflection,the temperature correction coefficients calculated based on the finite element model is close to experiment value,and numerical methods can be used as the effective supplement of experimental research.

关 键 词：沥青路面 动态弯沉 热-结构耦合 数值分析 温度修正 

分 类 号：U416.2[交通运输工程—道路与铁道工程]