长大桥梁快速荷载试验分析方法研究  

Research on Analysis Method of Fast Load Test for Long-span Bridges

作　　者：彭家意 承宇 邵泽宇 张宇峰 PENG Jiayi;CHENG Yu;SHAO Zeyu;ZHANG Yufeng(JSTI Group Co.,Ltd.,Nanjing 211112,China;State Key Laboratory of Safety,Durability and Healthy Operation of Long Span Bridges,Nanjing 211112,China;College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]苏交科集团股份有限公司,南京211112 [2]长大桥梁安全长寿与健康运维全国重点实验室,南京211112 [3]河海大学土木与交通学院,南京210098

出　　处：《现代交通技术》2025年第1期33-39,共7页Modern Transportation Technology

基　　金：江苏省重点研发计划项目(BE2021021);江苏省科技成果转化专项(BA2022009)。

摘　　要：研究基于实测影响线的长大桥梁快速荷载试验方法,采用重车缓行的方式,测量长大桥梁的影响线并对影响线进行误差分析和处理。参照实际加载方案,通过影响线和模拟荷载计算出的响应值,可与有限元模型计算值进行对比分析,以评定长大桥梁的承载能力。在江阴长江公路大桥的荷载试验中,利用结构健康监测系统测量桥梁主梁跨中及南北四分点的挠度影响线,并进行模拟加载,相应结果与常规试验值的差异在7.1%以内,表明快速荷载试验满足工程需求。The research studies a fast load test method based on measured influence lines of the long-span bridge.The influ-ence lines of the long-span bridge can be measured through slow moving heavy vehicle load.The errors should be eliminated from the influence lines through error analysis.According to the actual load test plan,the response value calculated through the influence line and the simulated load can be compared to the value of the finite element model to evaluate the bearing ca-pacity of the long-span bridge.During the load test of Jiangyin Yangtze River Bridge,the structural health monitoring system was used to measure the deflection influence lines at the mid span and north-south quarter points of the bridge main beam,and simulated loading was carried out.The difference between the corresponding results and the conventional test val-ues was within 7.1%,indicating that the fast load test meets the engineering requirements.

关 键 词：快速荷载试验 影响线 长大桥梁 挠度 结构健康监测 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]