基于WIM数据的简支梁桥车辆荷载效应分析  

Analysis on Traffic Load Effect of Simply Supported Beam Bridge Based on WIM Data

作　　者：张征文[1,2] 杨飞[1] 赵建峰[1] 袁阳光[1] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]浙江交通职业技术学院,浙江杭州311112

出　　处：《公路交通科技》2014年第5期86-92,共7页Journal of Highway and Transportation Research and Development

基　　金：浙江省交通运输厅科技计划项目(2011H10)

摘　　要：基于安装在104国道绍兴段钟家湾立交桥的WIM系统采集为期1个月的车辆荷栽数据，分析了不同类型车辆实际载重质量分布，根据影响线加载原理计算了WIM系统记录的每辆车作用下简支梁跨中最大弯矩及支点最大剪力效应值，分析了实际交通车辆荷载作用下跨径为6—50m的12种简支梁桥结构内力分布规律，并与现行桥梁设计规范中汽车荷载对应的效应值进行了对比。最终结果发现：针对于该路段的实际车辆荷载，简支梁桥跨径越小，实际车辆荷载效应超越现行规范荷载效应的车辆数目越多。The actual load distribution of different types of vehicles is analyzed based on the traffic load data of a month recorded by a WIM system installed in Zhongjiawan overpass located in Shaoxing section of National Highway No. 104. The maximum bending moment of the mid-span and the maximum shear force of fulcrum of simply supported beam under each passing vehicle load recorded by the WIM system are calculated according to the principle of influence line loading. The internal force distributions of 12 kinds of simply supported beam bridge, whose spans are from 6 m to 50 m, under actual traffic load are analysed, and these values are compared with the effect values of the traffic loads in current bridge design specification. The results show that for the actual traffic load in this road section, the smaller the span of the simply supported beam bridge, the larger the vehicle number of actual traffic load effect value beyond the effect value in current specification.

关 键 词：桥梁工程 实际车辆荷载 影响线加载 简支梁桥 WIM系统 

分 类 号：U448.21[建筑科学—桥梁与隧道工程]