ABSTRACT

This study conducts a rational investigation of nine years of traffic monitoring information concerning the Jiangyin Yangtze River Bridge within which the traffic flow, vehicle composition, vehicle load and axle-weight features are analyzed and discussed. Based on the annual analysis of traffic information, it is observed that compact cars weighing less than 30 kN account for 61% of the total traffic volume. According to the number of axles, wheelbase and axle groups, the vehicles in the traffic flow are classified into 11 representative types. Among them, two-axle vehicles form the major category, accounting for 80% of the total traffic flow. Statistical analysis of the gross vehicle weight and axle weight indicates that the gross vehicle weight follows a bimodal normal distribution, whereas the axle weight follows diverse distributions, including a normal distribution and an extreme distribution. In addition, by using equivalent damage theory, five equivalent vehicle models are established according to measurements of the axle weight and wheelbase. Finally, a six-axle fatigue-loaded vehicle model is proposed and discussed.

摘要

本研究对江阴长江大桥9年交通监测信息进行了理性调查，分析讨论了江阴长江大桥的交通流量、车辆组成、车辆载重和轴重特征。根据对交通信息的年度分析，观察到重量小于 30 kN 的紧凑型汽车占总交通量的 61%。根据车轴数、轴距和轴组数，将交通流中的车辆分为11种代表性类型。其中，两轴车是大类，占总车流量的80%。车辆总重和轴重的统计分析表明，车辆总重服从双峰正态分布，而轴重服从多元分布，包括正态分布和极值分布。此外，利用等效损伤理论，根据轴重和轴距的测量值，建立了5个等效车辆模型。最后，提出并讨论了一种六轴疲劳载荷车辆模型。