基于监测数据的钢管混凝土拱桥健康安全评估  

Health and Safety Assessment of CFST Arch Bridge Based on Monitoring Data

作　　者：蓝先林 王德铭 马生涛 陈子彦 朱承前[1] LAN Xianlin;WANG Deming;MA Shengtao;CHEN Ziyan;ZHU Chengqian(Guizhou Transportation Planning Survey and Design Academe Co.Ltd.,Guiyang 550081,China)

机构地区：[1]贵州省交通规划勘察设计研究院股份有限公司,贵阳550081

出　　处：《交通科技》2023年第1期51-54,65,共5页Transportation Science & Technology

摘　　要：为评价钢管混凝土(CFST)拱桥营运阶段的健康状况,利用BIM和midas Civil平台分别建立某CFST拱桥健康监测系统和有限元模型,结合实测数据对CFST拱桥有限元模型进行修正,在修正后的有限元模型基础上,从受力变形的角度对CFST拱桥安全状况进行评估。研究表明,在1/4截面和3/4截面的主梁挠度实测值平均分别为25.10 mm和22.87 mm;结合修正后的基准有限元模型进行CFST拱桥的结构安全状态评估,结果表明,CFST拱桥结构处于安全状态。In order to explore the health status of CFST(concrete filled steel tubular)arch bridge in the operation stage,firstly,the health monitoring system and finite element model of a CFST arch bridge are established by using BIM and midas Civil platforms respectively.Secondly,the finite element model of CFST arch bridge is modified in combination with the measured data.Finally,based on the modified finite element model,the safety status of CFST arch bridge is evaluated from the perspective of stress and deformation.The results show that the measured deflection values of the main beam at 1/4 section and 3/4 section are 25.10 mm and 22.87 mm respectively.Combined with the modified benchmark finite element model,the structural safety status of CFST arch bridge is evaluated,and the results show that the CFST arch bridge structure is in a safe state.

关 键 词：CFST拱桥 BIM模型 健康监测系统 基准有限元模型 安全评估 

分 类 号：U447[建筑科学—桥梁与隧道工程]