Damage Identification in Cable-Stayed Bridge Based on Modal Analysis and Neural Networks

Zhang, Xiedong; Zhang, Zhiguo; Li, Xiaofan; Zhan, Hongbin

doi:10.1063/1.2718135

Cited by 4 publications

(6 citation statements)

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“…The flexibility-derived indices used for localizing damage mainly include flexibility curvature, strain flexibility, proportional flexibility, virtual displacement, and so on. Zhang and Aktan [36] proposed the flexibility curvature method to locate structural damage. According to the central differencing method, the flexibility curvature of the damaged structure can be calculated through Equation ( 22) as follows:…”

Section: Localization Of Damage Using Flexibility-derived Indicesmentioning

confidence: 99%

Structural Damage Detection Based on Static and Dynamic Flexibility: A Review and Comparative Study

Peng,

Yang,

Qin

et al. 2023

Coatings

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Material damage in structures must be detected in a timely manner to prevent engineering accidents. Damage detection based on structural flexibility has attracted widespread attention in recent years due to its simplicity and practicality. This article provides a detailed overview of damage detection methods based on structural flexibility. Depending on the calculation method and data used, flexibility-based methods can be divided into the following categories: flexibility difference, flexibility derivative index, flexibility sensitivity, flexibility decomposition, static flexibility, and combinations of flexibility with other methods. The basic principles and main calculation formulas of various flexibility methods are explained, and their advantages and disadvantages are analyzed. For the method using flexibility difference, the advantage is that the calculation is very simple and does not require the construction of a finite element model of the structure. The disadvantage is that it requires the measurement of modal data of the intact structure, and this method cannot quantitatively assess the degree of damage. For the method using the flexibility derivative index, the advantage is that it only requires the modal data of the damaged structure to locate the damage, but this method is particularly sensitive to noise in the data and is prone to misjudgment. For methods based on flexibility sensitivity and flexibility decomposition, the advantage is that they can simultaneously obtain the location and degree of damage in the structure, but the disadvantage is that they require the establishment of accurate finite element models in advance. Static flexibility methods can compensate for the shortcomings of dynamic flexibility methods, but they usually affect the normal use of the structure during static testing. Combining flexibility-based methods with advanced intelligent algorithms and other methods can further improve their accuracy and efficiency in identifying structural damage. Finally, this article discusses the challenges that have not yet been solved among damage detection methods based on structural flexibility.

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Section: Localization Of Damage Using Flexibility-derived Indicesmentioning

confidence: 99%

Structural Damage Detection Based on Static and Dynamic Flexibility: A Review and Comparative Study

Peng,

Yang,

Qin

et al. 2023

Coatings

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“…The so-called global health monitoring methods are mostly defined based on the dynamic properties of the structure such as natural frequencies, damping ratios, or mode shapes [1][2][3][4][5]. These methods usually do not provide accurate information about the extent of the damage.…”

Section: Introductionmentioning

confidence: 99%

A hybrid approach for safety assessment of the double span masonry vaults of the Brooklyn Bridge

Talebinejad

Fischer

Ansari

2011

J Civil Struct Health Monit

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Brick masonry vaults for the approach structures of the Brooklyn Bridge were instrumented for remote monitoring. The objective of the project was to monitor and quantify safety of the structure, because of the longitudinal cracks at the crown of the double span vaults. A fiber optic sensor system was installed in the Brooklyn Bridge to monitor the crack opening displacements, wall rotations, temperature fluctuations, and vibrations. To quantify safety, a scaled model of the masonry vault was also tested in the laboratory in order to determine the failure crack opening displacement limits of the vaulted structure. Fiber optic crack sensors were mounted on the test vault to record the crack opening displacements under a range of base movements. Correlation of the in-service and failure crack opening displacements from the field measurements and laboratory tests provided the basis for the quantification of safety. This article provides a synopsis of activities to achieve these goals in terms of monitoring plans, instrumentation, and analysis of remote field data, laboratory experimental results and formulation of the safety assessment strategies.

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“…Applicability of FEM updating for dynamic assessment of bridges has been investigated by several researchers (Simmermacher et al, 1995; Zhang et al, 2007; Pereraa and Ruiz, 2008; Moaveni et al, 2009). Detailed FEMs of bridges are key to successful updating that results in more computation difficulties.…”

Section: Introductionmentioning

confidence: 99%

Numerical Evaluation of Vibration-Based Methods for Damage Assessment of Cable-Stayed Bridges

Talebinejad

Fischer

Ansari

2010

Computer-Aided Civil and Infrastructure Engineering

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This study investigated a number of different damage detection algorithms for structural health monitoring of a typical cable-stayed bridge. The Bayview Bridge, a cable-stayed bridge in Quincy, Illinois, was selected for the study. The focus was in comparing the viability of simplified techniques for practical applications. Accordingly, the numerical analysis involved development of a precise linear elastic finite element model (FEM) to simulate various structural health monitoring test scenarios with accelerometers. The Effective Independence Method was employed to locate the best distribution of the accelerometers along the length of the bridge. The simulated accelerometer data based on the FEM analysis was employed for the evaluation of the four damage identification methods investigated here. These methods included the Enhanced Coordinate Modal Assurance Criterion, Damage Index Method, Mode Shape Curvature Method, and Modal Flexibility Index Method. Some of these methods had been previously applied only to a number of specific bridges. However, the investigation here provides the relative merits and shortcomings of the damage detection methods in long-span cable-stayed bridges.

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Damage Identification in Cable-Stayed Bridge Based on Modal Analysis and Neural Networks

Cited by 4 publications

References 0 publications

Structural Damage Detection Based on Static and Dynamic Flexibility: A Review and Comparative Study

Structural Damage Detection Based on Static and Dynamic Flexibility: A Review and Comparative Study

A hybrid approach for safety assessment of the double span masonry vaults of the Brooklyn Bridge

Numerical Evaluation of Vibration-Based Methods for Damage Assessment of Cable-Stayed Bridges

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