水泥混凝土路面疲劳温度应力的计算

The Estimation of Fatigue-thermal Stress of Concrete Pavements

本文根据我国各地太阳辐射的规律以及文献５中的太阳辐射量与混凝土路面的温度梯度的回归关系式，分析了各地日最大温度应力的年变化规律和年最大温度应力的分布规律；按照混凝土路面疲劳消耗等效的原则和新混凝土疲劳方程，将复杂多变的混凝土路面温度应力等效地换算成单一的疲劳温度应力系数与最大温度应力相乘的疲劳温度应力，并对各地的疲劳温度应力系数进行回归显式化。从而使考虑混凝土路面温度应力的疲劳消耗影响极为方便。

In this paper, the annual variation of the maximum daily thermalstresses in concrete pavements and the distribution functions of the maximum annualthermal stresser are analysed based on the solar radiation law in different parts ofChina as well as the regression formulae correlating the solar rediation energy to thepavement thermal gradient derived from reference paper. Then,the complicatedthermal stress of concrete pavement is simplified equivalently to be a fatigue-thermalstress by multiplying the maximum thermal stress with a single fatigue-thermal stressfactor and such factors for different parts of China are also derived and regressed inan explicit expression so that the fatigue damage in concrete pavement due to thermalstress can be evaluated easily.