论文部分内容阅读
温度裂缝与水损坏是寒冷地区沥青路面常见的病害形式,对路面性能有重要影响。通过冻融循环试验模拟,分析了温度与水分冻融环境对沥青混合料性能的影响;基于沥青路面结构可靠度方程,通过考虑影响因素不确定性,采用一次二阶矩法求解路面结构强度可靠度功能函数,对沥青路面结构的可靠性展开研究。研究结果表明:沥青混合料的抗压回弹模量随冻融循环作用次数的增加呈减小趋势;路面结构可靠度随冻融循环次数的增加也呈降低趋势,冻融循环作用对路面结构的可靠度有显著影响;冻融循环变异系数取值对路面结构可靠度也有一定影响;在实际工程分析中应重视外界环境的影响。
Temperature cracks and water damage are common forms of disease in asphalt pavement in cold regions and have an important impact on pavement performance. Through the freeze-thaw cycle test simulation, the influence of temperature and moisture freeze-thaw environment on the performance of asphalt mixture was analyzed. Based on the reliability equation of asphalt pavement structure, by taking the uncertainties of influencing factors into consideration, Degree of function, the reliability of asphalt pavement structure to conduct a study. The results show that the compressive resilience modulus of asphalt mixture decreases with the increase of the number of freeze-thaw cycles. The reliability of pavement structure also decreases with the increase of the number of freeze-thaw cycles. The effect of freeze-thaw cycles on the pavement structure Of the reliability of the significant impact; freeze-thaw cycle coefficient of variation of the reliability of the pavement structure also have a certain impact; in the actual project analysis should pay attention to the impact of the external environment.