沥青混凝土温度应力影响因素分析  

Analysis of Factors Affecting Asphalt Concrete Temperature Stress

作　　者：郭学东[1] 孙明志[1] 韩硕[2] 王振勇[1] 朱凯旋[1] 

机构地区：[1]吉林大学交通学院,长春市130022 [2]辽宁工业大学,锦州市121001

出　　处：《公路》2015年第11期31-37,共7页Highway

基　　金：国家自然科学基金;项目编号51178204

摘　　要：通过试验路观测沥青道路结构内实际温度值,总结道路结构内实际温度分布情况及变化规律。在此基础上建立低温下沥青混凝土道路热—结构耦合三维有限元模型,分析降温幅度、沥青面层及基层参数对沥青混凝土路面温度应力的影响规律。此外,还考虑了沥青面层与基层间的接触状况对温度应力的影响。结果表明:降温幅度的变化对道路结构内所引起的温度应力产生的影响最大;沥青面层模量及面层温缩系数的变化对结构内的温度应力影响较大;而沥青面层厚度、基层厚度及基层模量的变化对结构内的温度应力影响都有限,当这些参数值发生变化时,温度应力基本保持不变;层间接触状态的变化对路面结构的力学响应有一定的影响,特别是层间接触状态不同的接触界面。In this paper the situation and the actual changes of temperature distribution of road structure are summarized through experimental observation to the actual temperature value of asphalt road structure, and on this basis thermal-structure coupling finite element model is established for asphalt concrete pavement under low temperature to analyze the influence of temperature drop range, the asphalt surface layer and basic parameters on asphalt pavement temperature stress. In addition the impact of contact conditions between asphalt surface layer and basic level on the temperature stress is considered. The results show that. temperature drop range change on the road structure causes the greatest effect on the temperature stress~ asphalt surface layer change shrinkage coefficient modulus and surface temperature have large impact on the structure temperature stress; and the asphalt surface layer thickness, base thickness, base modulus changes of structure within the effects of thermal stress are limited, when these parameters change, the temperature stress remains unchanged; the change in the contact layer has some influence on the mechanical response of pavement structure, especially the contact state of contact interface between different layers.

关 键 词：沥青混凝土路面 温度应力 有限元 层间接触 

分 类 号：U416.217[交通运输工程—道路与铁道工程]