Influence lines-based model updating of suspension bridges considering boundary conditions

Lin, Song–Shu; Du, Yanliang; Yi, Ting‐Hua; Yang, Dong‐Hui

doi:10.1177/13694332221126374

Cited by 4 publications

(4 citation statements)

References 26 publications

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“…The FEMU method depends on the modified parameters of the model. Although some scholars have taken into account the uncertainty of these parameters [135,137,139,149] and the nonlinearity of the structure [141,142,144], in the FEM analysis of complex structures, faced with a large number of correction parameters, a repeated calculation process will lead to a slow updating process or deviation. The substructure method can decompose the whole model correction process into several independent blocks to avoid the double calculation of local damage.…”

Section: Other Femu Methodsmentioning

confidence: 99%

“…The results showed that the identified LBS had sufficient accuracy, and the analytical value of the longitudinal displacement was in good agreement with the actual value. Lin et al [137] also used a GP model to replace FEM in a study of model updating methods based on influence lines. In a case study of a long-span suspension bridge, this substitution improved the efficiency of the iterative optimization of boundary condition estimates.…”

Section: Gaussian Process-based Femumentioning

confidence: 99%

“…First-order reliability method and modular Bayesian approach Experimental box girder bridge [135] Temperature consideration and longitudinal boundary stiffness Jiangyin Suspension Bridge [136] Boundary conditions consideration and influence lines Large-span suspension bridge [137] Bayesian Inference…”

Section: Gaussian Processmentioning

confidence: 99%

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The Current Development of Structural Health Monitoring for Bridges: A Review

et al. 2023

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The health monitoring system of a bridge is an important guarantee for the safe operation of the bridge and has always been a research hotspot in the field of civil engineering. This paper reviews the latest progressions in bridge health monitoring over the past five years. This paper is organized according to the various links of the bridge health monitoring system. Firstly, the literature on monitoring technology is divided into two categories, sensor technology and computer vision technology, for review. Secondly, based on the obtained monitoring data, the data processing methods including preprocessing, noise reduction, and reconstruction are summarized. Then, the technical literature on abnormal data early warning systems is summarized. The recent advances in vibration-based and non-destructive testing-based damage identification methods are reviewed in the next section. Finally, the advantages and disadvantages of the existing research and the future research directions are summarized. This review aims to provide a clear framework and some reliable methods for future research.

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Section: Other Femu Methodsmentioning

confidence: 99%

Section: Gaussian Process-based Femumentioning

confidence: 99%

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The Current Development of Structural Health Monitoring for Bridges: A Review

et al. 2023

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“…Compared with the temperature effect of cable suspension bridges (Lin et al, 2022; Wang et al, 2022; Xia et al, 2013; Zhou and Sun, 2019a; Zhu et al, 2022), the temperature action of cable-stayed bridges is more complicated for two reasons. First, a large number of stay cables induces high indeterminacy within the bridge.…”

Section: Introductionmentioning

confidence: 99%

Temperature behavior of cable-stayed bridges. Part II — temperature actions by using unified analysis

Shan

Qiang²,

et al. 2023

Advances in Structural Engineering

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The temperature action of long-span cable-stayed bridges is complicated because of the high indeterminacy of their structure. Previous studies on the temperature behavior of bridges were either limited by finite sensors, failing to capture the accurate relation between the temperature field and temperature-induced responses, or constrained to a “divide-and-conquer” strategy, requiring considerable manual intervention and regarded as computationally inefficient. This study develops a unified approach to the investigation of thermal behaviors of cable-stayed bridges by integrating the heat-transfer analysis and structural analysis based on the same refined global 3D finite element model. The companion paper (Part I) investigates the temperature distribution, while this paper (Part II) focuses on temperature-induced responses. The temperature distribution data is automatically converted to thermal loads, and thermal elements are changed to structural elements to calculate the temperature-induced responses of the bridge. Results show that the effect of the temperature variation of cables is nonnegligible and should be taken into account during the structural analysis. The longitudinal displacement of the girder and the longitudinal displacement of the tower top are mainly influenced by the average girder temperature, the mid-span deflection and the cable stress are dominated by the cable temperature and average girder temperature, and the stress of the girder is controlled by the vertical temperature difference. The ratio of the thermal stress to the dead load stress of the girder can reach 96%. The calculated displacement and stress of the bridge agree well with the corresponding measurements, consequently verifying the effectiveness of the proposed unified approach to calculating temperature-induced responses.

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Compressive sensing-based construction of high-resolution mode shapes for updating bridge boundary constraints

He,

Li,

Yang

2024

J Civil Struct Health Monit

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In this study, a method of finite element model updating is proposed to quantitatively identify bridge boundary constraints using the high-resolution mode shapes of a bridge. The high-resolution mode shapes are first identified from the responses measured by few randomly distributed sensors using the compressive sensing theory, which is innovatively implemented in the spatial domain with a proposed basis matrix. To speed up finite element updating, the frequency and modal assurance criterion Kriging models are then established to approximate the implicit relation between boundary constraints and bridge modal parameters including frequencies and mode shapes, serving as surrogate models for the bridge finite element model. By adopting the surrogate models in finite element updating, the objective functions of frequencies and mode shape indicators are optimized by a multi-objective genetic algorithm. The numerical examples as well as an actual laboratory experiment have shown that the mode shapes and boundary constraints of a bridge can be identified precisely and efficiently by the proposed method, even for a continuous and variable cross-sectional bridge.

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Influence lines-based model updating of suspension bridges considering boundary conditions

Cited by 4 publications

References 26 publications

The Current Development of Structural Health Monitoring for Bridges: A Review

The Current Development of Structural Health Monitoring for Bridges: A Review

Temperature behavior of cable-stayed bridges. Part II — temperature actions by using unified analysis

Compressive sensing-based construction of high-resolution mode shapes for updating bridge boundary constraints

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