城市桥梁汽车荷载调查与疲劳荷载模型研究

发布时间：2018-04-08 19:20

本文选题：桥梁工程　切入点：疲劳荷载模型　出处：《公路交通科技》2014年06期

【摘要】：以成都市城市快速路三环路的汽车荷载为研究对象,在道路的东、南、西、北4个方向各全天候不间断地连续测试7 d,采集车辆信息共计122万余辆,信息包括交通流量、轴重、轴距、总重、车速和车牌等。最后以成都市三环路北段的测试数据为基础,根据299 439条汽车荷载信息,统计出成都市三环路的汽车荷载频值谱。依据基于损伤应变的疲劳等效原则和英国BS5400规范的计算方法,以实测的车辆荷载频值谱为基础,制定出符合成都市三环路的汽车疲劳荷载模型。对于其他交通组成相同的道路,该汽车荷载模型可为道路桥梁的疲劳损伤验算提供有价值的参考。
[Abstract]:Taking the vehicle load of the third Ring Road of Chengdu City Expressway as the research object, the vehicle information was collected for more than 1.22 million vehicles, including traffic flow and axle load, in the four directions of east, south, west and north of the road without interruption for 7 days.Wheelbase, gross weight, speed, license plate, etc.Finally, based on the test data of the north section of the third Ring Road in Chengdu, according to 299,439 vehicle load information, the frequency spectrum of the vehicle load on the third Ring Road in Chengdu is calculated.Based on the fatigue equivalent principle based on damage strain and the calculation method of British BS5400 code, the vehicle fatigue load model in accordance with the third Ring Road of Chengdu is developed based on the measured frequency spectrum of vehicle load.For other roads with the same traffic composition, the vehicle load model can provide a valuable reference for checking the fatigue damage of road and bridge.
【作者单位】：四川农业大学城乡建设学院;西南交通大学土木工程学院;
【基金】：四川省教育厅重点科研项目(13ZA0251)
【分类号】：U441.2;U461

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