[1]熊文,鲁圣弟,席进,等.基于索力模型修正的斜拉桥主梁损伤识别与验证[J].东南大学学报(自然科学版),2019,49(3):467-473.[doi:10.3969/j.issn.1001-0505.2019.03.009]
 Xiong Wen,Lu Shengdi,Xi Jin,et al.Main girder damage detection and verification of cable-stayed bridges based on cable force model updating[J].Journal of Southeast University (Natural Science Edition),2019,49(3):467-473.[doi:10.3969/j.issn.1001-0505.2019.03.009]
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基于索力模型修正的斜拉桥主梁损伤识别与验证()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
49
期数:
2019年第3期
页码:
467-473
栏目:
交通运输工程
出版日期:
2019-05-20

文章信息/Info

Title:
Main girder damage detection and verification of cable-stayed bridges based on cable force model updating
作者:
熊文1鲁圣弟2席进3韦国志2端木详永1
1东南大学交通学院, 南京 211189; 2安徽省交通控股集团有限公司, 合肥 230088; 3安徽省交通规划设计研究总院股份有限公司, 合肥 230088
Author(s):
Xiong Wen1 Lu Shengdi2 Xi Jin3 Wei Guozhi2 Duanmu Xiangyong1
1School of Transportation, Southeast University, Nanjing 211189, China
2Anhui Transportation Holding Group Co., Ltd., Hefei 230088, China
3Anhui Transport Consulting and Design Institute Co., Ltd., Hefei 230088, China
关键词:
斜拉桥 索力 模型修正 损伤识别 验证
Keywords:
cables-stayed bridge cable force model updating damage identification verification
分类号:
U442.59
DOI:
10.3969/j.issn.1001-0505.2019.03.009
摘要:
为了快速检测斜拉桥主梁损伤,提出了一种基于索力模型修正的识别方法.首先建立了桥梁有限元模型并进行模型验证,形成优选原则以确定重点关注节段,将其单元刚度变化作为损伤识别参数修正变量,并将运营阶段实测索力作为跟踪目标.通过不断更新主梁不同节段局部刚度折减系数的取值进行模型修正,直至模型中的索力数值与实测索力值一致,此时的局部刚度折减系数取值与区域代表了主梁的刚度退化程度与所在位置.以蚌埠淮河大桥为例,利用荷载试验原始数据得到该桥成桥初态,以主梁节段接缝处局部刚度作为识别对象,以运营阶段实测索力作为跟踪目标,利用所提方法对主梁刚度退化的程度与位置进行识别,并基于桥检实测数据与结论验证该识别结果的准确性.分析结果表明,该方法具有科学合理与便捷经济的特点,适用于斜拉桥主梁运营状态的快速诊断与异变检测,可融入常规桥梁检测项目中.
Abstract:
For a quick damage detection of cable-stayed bridge girders, a cable force-based model updating method was proposed. First, a finite element(FE)bridge model was established and validated. The updated segments were selected by a selective preference principle and the segmental stiffness change was regarded as the updating variable during the damage detection. The measured cable forces during the bridge operation were regarded as the tracing target for the model updating. Then, the stiffness of selected segments was updated by setting different values of the stiffness reduction coefficient until the cable forces in the FE model were the same with the measured values. The values and the positions of these stiffness reduction coefficients represented the levels and locations of the damages in the main girder, respectively. The Bengbu Huaihe bridge was selected as a case study. The design condition of this bridge was determined by the original data from the loading test before bridge opening. The local stiffness of segment joints and the measured cable forces during the operation were regarded as the identification variable and tracing target, respectively. The identification results based on the proposed method were verified by the measurement data and the assessment conclusion in the bridge inspection reports. The analysis results show that the proposed method is logical and economic. It is suitable for quick assessment and change detection for cable-stayed bridges and can be integrated into routine projects of bridge inspection.

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备注/Memo

备注/Memo:
收稿日期: 2018-10-26.
作者简介: 熊文(1982—),男,博士,副教授,wxiong@seu.edu.cn.
基金项目: 安徽省交通运输科技进步计划资助项目、安徽省交通控股集团有限公司科技资助项目(JKKJ-2018-04,JKKJ-2018-18)、江苏省自然科学基金资助项目(BK20161417).
引用本文: 熊文,鲁圣弟,席进,等.基于索力模型修正的斜拉桥主梁损伤识别与验证[J].东南大学学报(自然科学版),2019,49(3):467-473. DOI:10.3969/j.issn.1001-0505.2019.03.009.
更新日期/Last Update: 2019-05-20