Finite-Element Model Updating for the Kap Shui Mun Cable-Stayed Bridge

Zhang, Q.W.; Chang, Tse-Yung P.; Chang, Cong

doi:10.1061/(asce)1084-0702(2001)6:4(285)

Cited by 127 publications

(71 citation statements)

References 16 publications

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“…A similar result was obtained by Brownjohn and Xia [9] for a curved road bridge spanning 100 m. Maximum frequency difference for a 90 m long road bridge of 6.2% was obtained by Jaishi and Ren [30]. On the other hand, the automatic Živanović, S., Pavić, A. and Reynolds, P. [29] conducted updating which targeted as many as 17 measured natural frequencies, which put lot of constraints to the optimisation procedure, whilst in the case of the footbridge where the maximum frequency error was 1.1% the updating was done according to natural frequencies and mode shapes for three measured modes only [8].…”

Section: Applications In Civil Structural Engineeringsupporting

confidence: 76%

“…The logical step forward was then to try the automatic updating procedure by using specialist software developed for this purpose. The procedure was successfully implemented on different types of structure, such as a 48-storey building [28], a high rise tower [12], road and/or rail bridges [9,29,30] and two footbridges [8]. Also, model updating has been attempted as a tool for damage identification [6,31,32].…”

Section: Applications In Civil Structural Engineeringmentioning

confidence: 99%

“…For example, when updating a 750 m long road and railway bridge, Zhang et al [29] got a maximum frequency error in the updated model of about 10%. A similar result was obtained by Brownjohn and Xia [9] for a curved road bridge spanning 100 m. Maximum frequency difference for a 90 m long road bridge of 6.2% was obtained by Jaishi and Ren [30].…”

Section: Applications In Civil Structural Engineeringmentioning

confidence: 99%

See 2 more Smart Citations

Finite element modelling and updating of a lively footbridge: The complete process

Živanović

Pavić

Reynolds

2007

Journal of Sound and Vibration

127

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The finite element (FE) model updating technology was originally developed in the aerospace and mechanical engineering disciplines to automatically update numerical models of structures to match their experimentally measured counterparts. The process of updating identifies the drawbacks in the FE modelling and the updated FE model could be used to produce more reliable results in further dynamic analysis. In the last decade, the updating technology has been introduced into civil structural engineering. It can serve as an advanced tool for getting reliable modal properties of large structures. The updating process has four key phases: initial FE modelling, modal testing, manual model tuning and automatic updating (conducted using specialist software). However, the published literature does not connect well these phases, although this is crucial when implementing the updating technology. This paper therefore aims to clarify the importance of this linking and to describe the complete model updating process as applicable in civil structural engineering. The complete process consisting the four phases is outlined and brief theory is presented as appropriate. Then, the procedure is implemented on a lively steel box girder footbridge. It was found that even a very detailed initial FE model underestimated the natural frequencies of all seven experimentally identified modes of vibration, with the maximum error being almost 30%. Manual FE model tuning by trial and error found that flexible supports in the longitudinal direction should be introduced at the girder ends to improve correlation between the measured and FE-calculated modes. This significantly reduced the maximum frequency error to only 4%. It was demonstrated that only then could the FE model be automatically updated in a meaningful way. The automatic updating was successfully conducted by updating 22 uncertain structural parameters. Finally, a physical interpretation of all parameter changes is discussed. This interpretation is often missing in the published literature. It was found that the composite slabs were less stiff than originally assumed and that the asphalt layer contributed considerably to the deck stiffness. This paper has been published under the following reference:Živanović, S., Finite element modelling and updating of a lively footbridge: the complete process.

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Section: Applications In Civil Structural Engineeringsupporting

confidence: 76%

Section: Applications In Civil Structural Engineeringmentioning

confidence: 99%

Section: Applications In Civil Structural Engineeringmentioning

confidence: 99%

See 1 more Smart Citation

Finite element modelling and updating of a lively footbridge: The complete process

Živanović

Pavić

Reynolds

2007

Journal of Sound and Vibration

127

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“…Based on whether the characteristic variable required for state identification depends on a structural model, the methods can also be classified into model-dependent methods and model-independent methods. In terms of identification strategy, the further classification of non-inversion-based, inversion-based and mixed-type identification methods can be adopted [1,2]. The inversion-based state identification method, mainly based on the model updating theory, is currently used.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Current State of Internal Force and the Optimization of Cable Force for an Existing Long-span Pre-Stressed Concrete (PC) Cable-stayed Bridge

Ye¹,

Sun²,

Huang³

2017

TOCIEJ

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Introduction:Due to the influence of load, fatigue, corrosion, natural material aging and other long-term adverse factors, the state of the internal force of a cable-stayed bridge will be changed. These long-term effects can result in the bridge not meeting specified functional requirements, and potentially resulting in structural failure. This investigation focuses on the parameter identification of a girder for a pre-stressed concrete (PC) cable-stayed bridge. Without considering the influence of cable relaxation and temperature on the girder's geometric shape, an improved method based on the "cable force-girder's displacement" relationship is proposed. Method:In this method, measurement variations of displacement and cable force are simultaneously obtained, enabling the use of an optimization method to identify parameters which need to be resolved. To verify the proposed method, a single pylon PC cable stayed bridge (2×160m) is selected as a case study. For the state of internal force, results from the case study bridge indicate that the crack resistance value of the girder no longer satisfies the demand of Generalized codes for design of highway bridges and culverts (JTG D60-2004,in Chinese). In order to adjust the internal force, cable force optimization was undertaken, whereby bending energy was taken as the objective function. Result:Using these results the geometric shape of the girder was restored to its initial state. The results also show that neither the crack resistance value nor the compression resistance value of the girder exceeded specified limits, and that the stress of the girder was effectively controlled.

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“…The literature presents some researches regarding virtual models calibration applied to railway vehicles (RIBEIRO et al, 2013) and also to structural components, such as bridges (ZHANG, CHANG and CHANG, 2001;SIPPLE and SANAYEI, 2014;WANG, LI and LI, 2010). These works present study cases of how vibration measurements can be used as feedback loops in CAE analysis, similar to what is proposed by Abrahamsson and Kammer (2015) using frequency responses.…”

Section: -Introductionmentioning

confidence: 99%

Proposal of a methodology to use physic measurements as feedback loops in computer-aided engineering analysis

Larocca¹,

Kubo

Paiva

et al. 2015

Cieng

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Within a new scenario in the product development cycle, led by an integrated and synchronized task approach, the combination of testing and simulation is a visible tendency even on the design stage of a component. In this regard, the main objective of this paper is to propose a methodology of how real (physic) measurements can be used as feedback loops in computer-aided engineering (CAE) analysis. For this purpose, a truck's suspension component, instrumented with strain gauges on its hotspots, has been tested in a proving ground track located in Brazil. Using an existing durability commercial software, virtual strain gauges have been placed in the component's finite element model and, with the measured forces inputs, theirs results were compared to the correspondents gauges on the real component. In the case study presented, the proposed methodology reduced the average error of simulation damage results from 58% to 30% on the tested component. This result suggests that this method is capable to offer good enhancements in CAE virtual analysis, providing calibrated finite elements models and consequently more reliable virtual verifications. Keywords: Computer-aided engineering, Strain gauges, Finite element analysis, Real measurements. RESUMOEm um novo cenário no ciclo de desenvolvimento de produto, caracterizado por uma abordagem sincronizada de atividades, a combinação de testes físicos e simulação é uma tendência observada até mesmo nas fases inicias de concepção de um componente. Dessa forma, o objetivo deste trabalho é propor uma metodologia de como medições reais (físicas) podem ser usadas na realimentação de análises de engenharia auxiliada por computador. Para isto, um componente da suspensão de um caminhão, instrumentado em seus pontos de maior tensão mecânica, foi testado em um campo de provas situado no Brasil. Usando um software comercial de durabilidade, extensômetros virtuais foram posicionados no modelo de elementos finitos do componente e, com as entradas de forças medidas, os seus resultados foram comparados aos dos sensores reais, instrumentados na peça física. No estudo de caso apresentado, a metodologia proposta reduziu o erro médio dos resultados numéricos de dano de 58% para 30% no componente testado. Tal resultado sugere que a metodologia proposta é capaz de proporcionar melhoras significativas em atividades de simulação, disponibilizando modelos numéricos calibrados e consequentemente verificações virtuais mais confiáveis. Palavras-chave: engenharia auxiliada por computador, extensômetros, análise de elementos finitos, medições reais.

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Finite-Element Model Updating for the Kap Shui Mun Cable-Stayed Bridge

Cited by 127 publications

References 16 publications

Finite element modelling and updating of a lively footbridge: The complete process

Finite element modelling and updating of a lively footbridge: The complete process

Assessment of the Current State of Internal Force and the Optimization of Cable Force for an Existing Long-span Pre-Stressed Concrete (PC) Cable-stayed Bridge

Proposal of a methodology to use physic measurements as feedback loops in computer-aided engineering analysis

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