武汉市集群桥梁车辆荷载特点分析与应用

Analysis and Application of Vehicle Load Characteristics of Cluster Bridge in Wuhan

为建立武汉市集群桥梁车辆荷载谱和车辆“智慧管控”,利用大数据挖掘及数理统计方法,对武汉市集群车辆荷载特点、超载车辆时-空分布规律以及超重车队过桥风险概率评估进行研究.结果表明:①武汉市三环线客货比8∶1,是以客运为主的城市主干道路,两轴小客车和三轴货车为主力车型,车长、车重为混合高斯分布,车间距为对数正态分布.②车辆超载仍属普遍现象,六轴车和四轴车为主力超载车型,超载车辆夜间出行占比77.5%,空间分布集中在各大工业区附近.提出了超重车队过桥风险概率评估模型,将风险划分为高、中、低三个水平,按照水平高低指导现场治超,武汉市“科技治超”管理流程表明了应用的可行性和有效性.

In order to establish the vehicle load spectrum and vehicle"intelligent control"of cluster bridges in Wuhan,the load characteristics of cluster vehicles in Wuhan,the time-space distribution law of overloaded vehicles,and the risk probability assessment of overweight vehicles crossing bridges were studied by using big data mining and mathematical statistics.The results show that:①The passenger-freight ratio of Wuhan Third Ring Road is 8:1,with two-axle passenger cars and three-axle freight cars as the main vehicles.The length and weight of vehicles are Gaussian mixture distribution,and the distance between vehicles is lognormal distribution.②Vehicle overloading is still a common phenomenon.Six-axle vehicles and four-axle vehicles are the main overloaded vehicles,and the proportion of overloaded vehicles traveling at night is 77.5%,and their spatial distribution is concentrated near major industrial areas.This paper put forward the probability evaluation model of overweight motorcade crossing the bridge risk,divides the risk into three levels:high,medium and low,and guides the on-site overtaking according to the level.The management process of“overtaking by science and technology”in Wuhan shows the feasibility and effectiveness of its application.