桥梁动态称重系统在自锚式独塔悬索桥轻型组合桥面中的试验研究  

Experimental study of bridge weigh-in-motion system in lightweight composite deck of self-anchored single tower suspension

作　　者：房啸 赵华[1] 张斌[1] 廖万成 张钰菲 FANG Xiao;ZHAO Hua;ZHANG Bin;LIAO Wancheng;ZHANG Yufei(Key Laboratory for Wind and Bridge Engineering of Hunan Province,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学风工程与桥梁工程湖南省重点实验室,湖南长沙410082

出　　处：《铁道科学与工程学报》2020年第10期2558-2567,共10页Journal of Railway Science and Engineering

基　　金：湖南省重点领域研发计划资助项目(2019SK2172)。

摘　　要：将桥梁动态称重(BWIM)系统应用在采用球扁钢-超高性能混凝土(STC)轻型组合桥面的自锚式独塔悬索桥中,根据球扁钢-STC轻型组合桥面局部受力显著的特点,通过标定球扁钢加劲纵肋来获取桥梁应变响应,基于BWIM系统算法反算车辆轴重信息。为最大化局部受力效应,选取桥塔截面为测试断面。实桥试验结果表明:采用各趟自身标定影响线的单轴轴重及总重识别误差要优于采用平均影响线的识别误差,但这2种情况均具有较高的轴重识别精度;BWIM系统可以高精度识别车辆单轴轴重以及总重,单轴轴重识别误差平均值为1.8%,总重识别误差平均值为0.2%;BWIM系统应用在采用球扁钢-STC轻型组合桥面的自锚式独塔悬索桥中能有效识别车辆速度、轴数、轴距以及轴重,为车辆超载监管和桥梁健康监测提供了一种有效方法。Bridge weigh-in-motion(BWIM)system was applied to the self-anchored single tower suspension bridge with a ball flat steel-super toughness concrete(STC)lightweight composite deck.The remarkable features are that the strain response of the bridge is obtained by calibrating the stiffened longitudinal ribs of the ball flat steel,and that the vehicle axle weight information is calculated based on the BWIM system algorithm.In order to maximize the local force effect,the fulcrum section was selected as the test section.The test results show that the identification error of uniaxial load and total weight using each self-calibration influence line is better than that of using the average influence line;however,both of them have high identification accuracy of axle load.BWIM system can identify uniaxial load and total weight of vehicle with high accuracy,i.e.,the average value of identification error of uniaxial load is 1.8%,and the average value of identification error of total weight is 0.2%.BWIM system can effectively identify vehicle speed,axle number,wheelbase and axle load in self-anchored single tower suspension bridge with ball flat steel STC light composite deck.It provides an effective method for vehicle overload supervision and bridge health monitoring.

关 键 词：球扁钢-STC轻型组合桥面 自锚式独塔悬索桥 桥梁动态称重 标定影响线 单轴轴重及总重识别 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]