摘要
为较准确地预测路面结构内部温度分布,解决实测耗费大的问题,作者以沪宁高速实体工程为例,基于热传学原理,建立了沥青路面结构体系的非线性瞬态3D温度场计算模型。借助路面所处地区的标准气象资料,确定温度场的边界条件和初始条件,并采用ADINA通用有限元软件进行分析求解。通过计算结果和实测值的对比发现,该模型具有很高的预测精度。计算结果表明:沿路面深度方向,温度、变温速率和温度梯度呈非线性分布并出现变化幅度减小、变化相位滞后的现象;日温差随路面深度增加呈指数分布迅速减小。本文研究结果可为高等级路面设计和材料选择提供可靠的温度依据。
To predict the thermal distribution of the pavement effectively, anumericalmodel of nonlinear transient thermal field for the asphalt pavement is established based on the heat conduction theory. And then, the initial and boundary conditions of the thermal field were obtained by analyzing the meteorologic datum. Finally, the thermal field of the asphalt pavement was simulated calculate results with by ADNIA the measur value of temperature, velocity so ed of ftware and the model was verified by comparing the datum from Hu-Ning Highway. The results show that the temperature variation and thermal gradient change nonlinearlywiththedepthof the pavement, and the variation phases retard. The relationship between the temperature difference within one day and the depth of the pavement can be described by an exponential function. The findings of the paper provides a thermal basis for the mixture and structure design of the highway pavement.
出处
《交通运输工程与信息学报》
2009年第3期33-38,56,共7页
Journal of Transportation Engineering and Information
基金
国家自然科学基金项目(批准号:50658001)资助
关键词
沥青路面
瞬态温度场
热分析
有限元法
模型
Asphalt pavement,transient thermal field, thermal analysis, finite element method,model
