基于WIM的新沂河大桥车辆荷载模型研究  

Study of Vehicle Load Models for Xinyi River Bridge Based on WIM Data

作　　者：宗周红[1] 李峰峰[1] 夏叶飞[2] 袁微微[2] 

机构地区：[1]东南大学土木工程学院,江苏南京210096 [2]江苏省交通规划设计院股份有限公司,江苏南京211100

出　　处：《桥梁建设》2013年第5期29-36,共8页Bridge Construction

基　　金：国家自然科学基金(51178101;51378112);"十二五"国家科技支撑计划资助项目(2011BAK02B03)联合资助~~

摘　　要：为研究京沪高速（G2）沂淮段新沂河大桥的实际运行车辆特征及车辆荷载作用效应,基于动态称重（WIM）系统实测数据和动力影响线理论,计算该桥实际运行车辆参数的统计分布,得到不同荷载重现期内的车辆荷载效应最大值概率分布,从而建立实际运行状态下该桥的车辆荷载模型.分析该桥车辆荷载模型特征,结果表明：该桥车重在一般运行状态下服从三峰分布,密集运行状态下服从多峰分布；车间距在一般运行状态下服从威布尔分布,密集运行状态下服从伽马分布；动态称重系统分析结果与健康监测系统分析结果基本一致,该桥左、右幅实际车辆荷载分别为公路-Ⅰ级荷载的1.06～1.34倍和1.60～1.69倍.To study the characteristics and load action effect of the vehicles actually operating on the Xinyi River Bridge on Beiyi-Huaijiang Section of Beijing-Shanghai Expressway （G2）,the statistic distribution of parameters of the vehicles actually operating on the bridge was calculated based on the data measured by the weigh-in-motion （WIM） system and the dynamic influence line theory.The probability distribution of the maximum values of the vehicle load effect in different load return periods was obtained,the vehicle load models for the bridge in the actual operation state were therefore established and the characteristics of the models were analyzed.The results of the analysis indicate that the vehicle weight of the bridge in the general operation state obeys the trimodal distribution and in the dense operation state,obeys the multimodal distribution.The vehicle gaps on the bridge in the general operation state obey the Weibull distribution and in the dense operation state,obey the Gamma distribution.The analysis results from the WIM system are basically consistent with those from the structural health monitoring system of the bridge,the actual vehicle loads on the left and right parts of the bridge are respectively 1.06～ 1.34 times and 1.60～1.69 times of the Highway-I Standard Load.

关 键 词：公路桥 连续梁桥 箱形梁 车辆荷载模型 动态称重系统 应变 统计 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]