基于WIM实测数据的北京市松山大桥重载交通车辆荷载模型  

Vehicles Load Model of Heavy Traffic for the Beijing Songshan Bridge Based on WIM Data

作　　者：庞旭然 杨璐[1] 柳美玉 韦韩 PANG Xu-ran;YANG Lu;LIU Mei-yu;WEI Han(Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China;Research Institute of Highway Ministry of Transport,Beijing 100088,China)

机构地区：[1]北京工业大学城市建设学部,北京市100124 [2]交通运输部公路科学研究所,北京市100088

出　　处：《公路》2023年第12期77-85,共9页Highway

基　　金：国家自然科学基金项目,项目编号52078011。

摘　　要：利用WIM动态称重系统,得到北京市松山大桥实际通行车辆的车辆荷载特征参数,经统计分析得到特征值,对其概率密度函数进行了拟合,建立了适用于本地区的重载交通车辆荷载模型,并与河北省和福建省的重载交通车辆荷载模型进行了对比。在此基础上,采用有限元模拟方法对建立的重载交通车辆荷载模型与现行规范进行荷载效应对比,分析结果表明,采用规范中公路—Ⅱ级汽车荷载设计的桥梁存在安全隐患;公路—Ⅰ级汽车荷载取值总体较为保守,但对于大跨径桥梁仍有不足,需要结合实际情况需要进一步研究。重车荷载对桥梁支座处剪力的影响较为明显,在桥梁设计与维护时应重点考虑。本研究成果可为北京地区的公路桥梁设计和结构损伤检验提供参考和建议。The vehicle load characteristic parameters of actual traffic vehicles of Songshan Bridge in Beijing are obtained by WIM weighing in motion(VIM)system.The characteristic values are calculated through statistical analysis meanwhile their probability density functions are fitted to establish the heavyduty traffic vehicle load model suitable for this region,and compared with the heavy-duty traffic vehicle load models in Hebei Province and Fujian Province.On this basis,the load effect of the established heavyduty traffic vehicle load model is compared with the current code by using finite element simulation.The analysis results show that:there are hidden safety dangers for the bridge designed with highway class-II vehicle load as per the specification;the value of highway Class I vehicle load is generally conservative,but there are still deficiencies for long-span bridges,which need to be further studied in combination with the actual situation.The effect of heavy-duty vehicle load on the shear force at the bridge bearing is obvious,which should be considered in the design and maintenance of the bridge.The conclusions can provide reference and suggestions for the design and structural damage inspection of highway bridges in Beijing.

关 键 词：桥梁工程 车辆荷载模型 数值模拟 重车效应 动态称重系统 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]