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对力学-经验型沥青道面结构设计方法中的飞机交通荷载分析方法进行研究,探讨了一种简化的荷载重复作用次数计算方法.通过理论分析,提出了以应力(应变)扩散斜率和等效宽度为中心的荷载重复作用次数简化计算概念.双层体系的结构响应分析表明,等效宽度是结构厚度和上下层结构相对刚度的函数.经过回归分析,给出了等效宽度和结构厚度的线性关系式,回归计算结果与基于道面空间响应得到的等效宽度之间的误差在5%以内.对于多层的道面结构,建议按照力学等效的方法转换成双层结构后进行计算.在此基础上,提出了单轮的荷载重复作用次数计算方法,并详细分析了横向多轮和纵向多轴的影响.基于单机型的计算分析,进一步扩展提出了混合交通条件下的荷载重复作用次数简化计算方法.
This paper studies the method of aircraft traffic load analysis in mechanics-experience asphalt pavement structure design method, and discusses a simplified calculation method for the number of times of load repetition.According to theoretical analysis, Width-centric load repetition number of times to simplify the concept of calculation.The structural response analysis of the two-tier system shows that the equivalent width is a function of the thickness of the structure and the relative stiffness of the upper and lower structure.After regression analysis, the equivalent width and thickness of the structure The linear relationship between the regression results and the equivalent width obtained from the space response of the pavement is within 5% .For multi-story pavement structure, it is suggested that the calculation should be based on mechanics equivalent method after converting into double-layer structure On this basis, the calculation method of the number of repetitions of a single wheel is proposed, and the effects of multiple horizontal and vertical multi-axes are analyzed in detail.According to the calculation and analysis of single-machine type, the load of mixed traffic conditions is further extended Reduce the number of repetitions calculation method.