飞机荷载重复作用次数的简化计算方法  

Simplified Methods for Calculating Aircraft Load Repetition

作　　者：赵鸿铎[1] 凌建明[1] 姚祖康[1] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《同济大学学报（自然科学版）》2011年第5期693-698,共6页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金(60776818)

摘　　要：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.The paper presents a discussion on the simplified methods for calculating aircraft load repetition,which is used in mechanistic-empirical pavement design procedure.A simplified concept based on stress/strain spread angle and equivalent width is put forward as the basis of load repletion calculation.The results based on double pavement layers analysis show that the equivalent width is the function of top layer thickness and relative stiffness of the layers.Then,the simplified equations for calculating equivalent width are put forward.The width differences between simplified method and spatial response-based method are within 5%.The pavement with more than two layers can be transferred to two layers according the equivalent approach.With the equivalent width,load repetition methods are developed for single tire,and a detailed analysis is made of the multiple tires and multiple axles as well.Furthermore,the equations with a consideration of the mixed traffic are put forward.

关 键 词：机场 沥青道面 设计方法 荷载重复作用次数 简化方法 

分 类 号：V351.11[航空宇航科学与技术—人机与环境工程]