东南大学学报（自然科学版）2023，Vol.53Issue(6)：1148-1155,8.DOI:10.3969/j.issn.1001-0505.2023.06.022
基于WIM的江苏省干线公路桥梁车辆荷载统计模型
Statistic model of vehicle loads for arterial highway bridges in Jiangsu Province based on WIM system
摘要
Abstract
Aiming to map the statistical model of vehicle loads for arterial highway bridges in Jiangsu Prov-ince,the typical vehicles in daily operations are categorized based on the recorded data provided by a weight-in-motion system(WIM)mounted on a representative highway bridge.Herein,statistical models for vehicle parameters are established.First,the traffic flows of vehicles with different axles are statistically analyzed.Then,the major vehicles in daily operation are categorized into 13 representative vehicle types according to ax-le spacing using the k-means method;the variations of axle load with vehicle weight are presented.On this ba-sis,the mixture distribution is employed to fit the probability density function of vehicle loads.In addition,the distributions of vehicle weight over thresholds are presented utilizing generalized Pareto distribution(GPD).Finally,the time and distance intervals between arrivals are statistically analyzed.The results indicate that the probability density distributions of vehicle weight are subject to bimodal or multimodal distributions.Meanwhile,the ratio of axle weight to vehicle weight tends to constant with the increase of vehicle weight,and the axle weight of each axle under the coupling axle has a consistent change law.In addition,the proba-bility of vehicles heavier than 50 t moving on the bridge at the same time reaches 9.31％due to the influence of the traffic lights near the bridge.关键词
车辆荷载/动态称重系统(WIM)/混合分布/广义Pareto分布(GPD)Key words
vehicle loads/weight-in-motion system(WIM)/mixture distribution/generalized Pareto distrib-ution(GPD)分类
交通工程引用本文复制引用
祝青鑫,王浩,陈铮一,廖睿轩..基于WIM的江苏省干线公路桥梁车辆荷载统计模型[J].东南大学学报（自然科学版）,2023,53(6):1148-1155,8.基金项目
国家自然科学基金资助项目(51978155)、东南大学混凝土及预应力混凝土结构教育部重点实验室开放课题基金资助项目(CPC-SME2023-08)、江苏省交通运输科技资助项目(2022G08). （51978155）
