沥青路面温度应力计算公式的修正

摘要

分析了实际路面温度场以及温度变化沿路面深度的分布规律。通过力学分析,指出了希尔斯（Hills）温度应力计算公式的缺陷,提出了修正的温度应力的计算公式。算例表明,在实际路面结构中,由温度随深度变化的不均匀分布引起的翘曲应力不容忽视,使用Hills公式计算的温度应力结果偏小,用其预估的断裂温度偏低。%Laws of distribution of the temperature changes are analyzed.The defect of Hills formula is pointed and the modified formula is proposed by mechanical analysis.Calculation indicates that the curling stress caused by uneven temperature distribution can not be neglected;the result of temperature stress calculated by Hills formula is smaller than that of modified formula;and the fracture temperature predicted by it is lower than that of modified formula.