摘要
通过建立路面结构随季节性变化的温度场和交通动荷载作用下路面结构粘弹性层状系模型，计算分析温度季节性变化和随深度的滞后对路面温度应力所产生的影响，以及交通荷载的作用程度。结果表明，道路开放交通所处季节、温降幅度和时间以及材料的传热性能（导致温度场的滞后）均影响着路面的低温缩裂，并决定了开裂位置的不同。温度和交通荷载的循环作用将造成路面的低温疲劳破坏。
By providing models of temperatures fields in pavement structures varying with seasons and pavement viscoelastic-layered systems under traffic moving loads, it is consulted and analyzed the influences on pavement temperature stresses caused by temperature variation with seasons, delaying by depth and traffic loading. Results show that the season highways being opened, temperature dropping level and time and material's conductibility of heat (causes temperature delaying by depth) influence pavement low-temperature cracking, and determine the cracking position.The low-temperature and traffic circling loads may induce pavement structure to fatigue cracking on low-temperature.
出处
《长沙交通学院学报》
1996年第1期34-40,共7页
Journal of Changsha Communications University
基金
国家自然科学基金
关键词
气温
低温缩裂
公路
路面
交通荷载
air temperature
low-temperature cracking
thermo-viscoelastic
fatigue
