车辆动态荷载系数的主要影响因素分析

ANALYSIS ON THE MAIN INFLUENTIAL FACTORS OF VEHICLE DYNAMIC LOAD COEFFICIENT

为了弥补现行规范将车辆荷载的动态荷载简化为静载的不足,本文应用四分之一车辆振动模型,系统分析了路面不平整度的振幅、坡长、车速、装载率等主要因素对动态荷载系数的影响规律。结果表明,车辆的动态荷载系数随着车速、振幅的增大而增大,随着装载率的增大而减小,随着路面坡长的增大而有减小的趋势。文中的研究成果可以为路面设计提供必要的荷载参数。

In order to make up the shortage that taking the vehicle dynamic load as static load in current specification, a quarter - vehicle vibration model was applied to analyze the influential law of dynamic load coefficient by pavement roughness＇ s surface amplitude and wave length, speed, loading rate in this paper. The results show that vehicle dynamic load coefficient would increase with the increase of axle load and pavement roughness＇ s surface amplitude, and would decrease with the increase of loading rate. There has the tendency that the vehicle dynamic load coefficient would decrease with pavement roughness＇ s wave length. These achievements can provide some necessary load parameters for pavement design.