基于WIM的高速公路桥梁车辆疲劳荷载谱研究

发布时间：2018-01-29 05:46

本文关键词： 桥梁工程疲劳荷载谱疲劳损伤贡献值动态称重系统　出处：《公路交通科技》2014年03期 　论文类型：期刊论文

【摘要】：为研究高速公路桥梁的实际车辆疲劳荷载谱,选取了京沪高速(G2)沂淮段新沂河大桥,基于动态称重系统(WIM)的监测信息,统计分析京沪高速沂淮段通行车辆的车重、车间距、轴重等特征参数;依据每月所得车辆数据,基于Miner线性积伤率和等效疲劳损伤原理,建立了新沂河大桥包含9类代表车型的实际运行车辆疲劳荷载谱,并对其疲劳损伤贡献值进行了研究。结果表明:各车道车重服从典型的三峰分布规律,车间距服从Weibull分布;六轴2类代表车,第1、2轴重服从典型Gauss分布,而第3~6轴重服从混合Gauss分布;车辆疲劳荷载谱值与疲劳损伤贡献值都以六轴2类车最大,其次为六轴车1类,可知该高速公路上以六轴重车为主,同时,对于疲劳损伤的贡献,六轴车占90%以上。
[Abstract]:In order to study the actual vehicle fatigue load spectrum of expressway bridge, the Xinyi River Bridge in Yi-Huai section of Beijing-Shanghai Expressway (G2) is selected based on the monitoring information of dynamic weighing system (WIM). The characteristic parameters, such as vehicle weight, vehicle spacing and axle load, are statistically analyzed in the Yi-Huai section of Beijing-Shanghai Expressway. Based on the monthly vehicle data and the principle of Miner linear damage rate and equivalent fatigue damage, the fatigue load spectrum of nine kinds of representative vehicles of Xinyi River Bridge is established. The fatigue damage contribution value is studied. The results show that the distribution of heavy clothing in each lane follows the typical three-peak pattern, and the distance clothing is distributed according to Weibull. Six axle type 2 represents the vehicle, the first axle load clothing is distributed from the typical Gauss, while the third one is from the mixed Gauss distribution. The fatigue load spectrum value and fatigue damage contribution value of the vehicle are the largest in the six-axle 2 type vehicle, followed by the six-axle vehicle class 1. It can be seen that the main vehicle on the highway is six-axle load car, and the contribution to fatigue damage. Six-axle car accounts for more than 90%.
【作者单位】：江苏省交通规划设计院股份有限公司;东南大学土木工程学院;
【基金】：国家自然科学基金项目(51178101,51378112)
【分类号】：U441.4
【正文快照】： 0引言工程实践中,评估桥梁疲劳损伤不应采用最不利[1]受载情况下的设计荷载,而应采用具有代表性的日常运营车辆荷载。就我国公路和城市桥梁而言,目前还没有适用于梁桥疲劳设计的车辆荷载谱[1],因此对公路桥疲劳车辆荷载谱的研究具有现实意义。目前,英、美[2-3]等国在各自的桥

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