【作者】 王桂茵；

【导师】 郑传超；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2011， 硕士

【摘要】 本文根据试验路温度实测数据,应用有限单元法模拟路面深度方向温度场分布及温度梯度,并分析了路面厚度,导热系数等因素对温度梯度影响规律。文中建立了低温下沥青路面结构力学计算模型,在温度场分析的基础上,进一步分析了低温状态下沥青路面温度应力,应变的分布规律。深入研究了材料参数以及结构参数,温度边界和参考温度对温度应力的影响规律,为考虑温度应力的沥青路面设计提供了依据,并初步提出了低温地区沥青路面结构设计的改进思路。更多还原

【Abstract】 In this thesis, finite element method was employed to analyze the thermal stress of asphalt pavement under low temperature. Firstly, a pavement structure model was proposed to analyze the thermal field and the thermal stress. According to the measured data, the distribution of temperature field and temperature gradient were obtained. The effect of thermal conductivity coefficient on the temperature gradient was simulated. Secondly, thermal stress in the asphalt pavement under low temperature was analyzed based on the analyzing of temperature field. The influence of material, structural parameters and temperature changes on the thermal stress was studied. In addition, the importance of reference temperature was emphasized. Finally, the author proposed a preliminary approach for the design of asphalt pavement in cold region. The research results are of reference value for improving asphalt pavement design under low temperature.更多还原