Damage identification of cable-stayed bridge based on wavelet packet energy transfer rate variation coefficient

被引：0

作者：

Liu J. ^{[1
,2
,3
,4
]}

Zheng W. ^{[1
,4
]}

Liu Q. ^{[1
,3
,4
]}

Wang H. ^{[2
,5
]}

Bu J. ^{[1
,6
]}

机构：

[1] State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang

[2] Hebei Key Laboratory of Diagnosis, Reconstruction and Anti-disaster of Civil Engineering, Zhangjiakou

[3] Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang

[4] School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang

[5] Hebei Innovation Center of Transportation Infrastructure in Cold Region, Zhangjiakou

[6] School of Traffic and Transportation, Shijiazhuang Tiedao University, Shijiazhuang

来源：

Tumu Gongcheng Xuebao/China Civil Engineering Journal | 2023年 / 56卷 / 08期

关键词：

cable-stayed bridge; damage identification; wavelet analysis; wavelet packet energy transfer rate variation coefficient method;

D O I：

10.15951/j.tmgcxb.22040324

中图分类号：

学科分类号：

摘要：

In order to minimize the impact of frequency band range selection and realize the damage positioning and quantification of cable-stayed bridge, a damage identification method of cable-stayed bridge based on wavelet packet energy transfer rate variation coefficient was proposed. The method was based on wavelet packet energy transfer method for damage identification of cable-stayed bridges. The damage index and damage degree index of wavelet packet energy transfer rate variation coefficient were derived through the integration of wavelet energy transfer rate and variation coefficient, the normalization of wavelet energy transfer rate variation coefficient and the quantification of central fourth moment. The effectiveness of proposed method was verified based on the cable-stayed bridge simulation analysis, so that the optimal wavelet packet basis and number of layers were determined; the obtained data was input to gain the damage index and damage degree index of real bridge, so as to judge the damage of real bridges. The damage case of the main girder was set and the transient dynamic analysis was carried out using the benchmark finite element model of cable-stayed bridge under environmental excitation to obtain the acceleration data of main girder. In combination with the measured data of real bridge, the damage positioning and quantification were conducted. The results indicate that: the simulation damage positioning identification has an accuracy of 100% and the damage degree identification has an accuracy of 96.80%. No influence is caused to damage positioning under the interference of White Gaussian Noise and the error of damage degree does not exceed 2.85%, verifying the effectiveness of proposed method for the bridge. The damage identification of real bridges indicated that real bridge had no damage. © 2023 Editorial Office of China Civil Engineering Journal. All rights reserved.

引用

页码：37 / 48

页数：11

共 19 条

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