Finite-Element Model Tuning of Global Modes of a Grandstand Structure Using Ambient Vibration Testing

Saudi, Ghada; Reynolds, Paul; Zaki, Mohammed; Hodhod, Hossam

doi:10.1061/(asce)cf.1943-5509.0000049

Cited by 16 publications

(10 citation statements)

References 2 publications

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“…The aim was to correct the geometrical and physical parameter or boundary condition of initial FE model through a model tuning procedure based on the experimental result such as frequencies and mode shape [16]. Comparison of the analytical and concerned experimental frequencies, it was observed that the FE model has lower natural frequencies because it has insufficient stiffness of an overestimation of mass [12]. …”

Section: Finite Element Modellingmentioning

confidence: 99%

Methods for Dynamic Characteristics Estimation of Bridge: An Overview

2017

IJSR

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Dynamic characteristics of bridge need to be determined for seismic design of bridge. A wide variety of field test and modelling of the bridge have been done to determine the dynamic characteristics of the bridge. This paper intends to present various research works carried out on analytical and experimental methods to evaluate dynamic characteristics of bridges. Paper gives an overview of work published by the researcher and their findings vibration testing, modelling of the bridge, which conducted on different bridges are presented.

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Section: Finite Element Modellingmentioning

confidence: 99%

Methods for Dynamic Characteristics Estimation of Bridge: An Overview

2017

IJSR

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“…The fact that AVT is nondestructive also represents a major advantage, making it very popular. Such experiments have (Brownjohn and Xia 2000), stadiums (Saudi et al 2009), and buildings (Ventura and Schuster 1996;Lamarche et al 2009). Results from these various field investigations were primarily used to find key dynamic properties and update FE models (Ventura et al 2005).…”

Section: Ambient Vibration Testsmentioning

confidence: 99%

Analysis of a damaged 12-storey frame-wall concrete building during the 2010 Haiti earthquake Part I: Dynamic behaviour assessment

et al. 2013

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Despite all the damages encountered during the 2010 Haiti earthquake, the 12-storey reinforced-concrete Digicel building behaved well, sustaining only reparable damages. Visual assessment to characterize the damages sustained and ambient vibration tests (AVT) were carried out to identify the building's key dynamics properties (natural vibration frequencies, mode shapes, and damping ratios). ETABS was used to generate finite element (FE) models before and after the AVT, to evaluate the capabilities of common modelling assumptions to predict the dynamic behaviour of structures. Nonautomated model updating was carried out to generate a model representing the building's actual dynamic behaviour in its damaged state. The study showed that the finite element method (FEM) is reliable for predicting the dynamic behaviour of structures, but is very sensitive to the modelling assumptions. The models could predict the vibration frequencies precisely, but an accurate representation of the mode shapes required careful model updating.Résumé : Malgré la destruction massive survenue lors du séisme d'Haïti en 2010, le bâtiment de 12 étages en béton armé de Digicel a bien résisté, ne subissant que des dommages réparables. L'évaluation de sa structure ainsi qu'une série d'essais sous vibrations ambiantes ont permis de caractériser son comportement dynamique (fréquences propres, modes propres et amortissement). Des modèles par éléments finis sur ETABS, avant et après les essais, ont permis d'évaluer la capacité de prédiction des techniques de modélisation courantes. Une calibration du modèle de base a ensuite permis d'élaborer un nouveau modèle numérique représentant bien le comportement réel du bâtiment. Cette étude a montré que la méthode des éléments finis permet de bien représenter le comportement dynamique de structures, mais que la méthode est sensible aux hypothèses considérées. Il a aussi été observé qu'un modèle peut prédire les fréquences propres sans pour autant représenter fidèlement le comportement dynamique (modes). Une calibration efficace a été nécessaire afin d'avoir un modèle représentant bien le comportement du bâtiment.Mots-clés : vibrations ambiantes, bâtiment en béton armé, dynamique des structures, séisme d'Haïti, modes propres, fréquences, amortissement, éléments finis.

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“…From the works developed by Lima Avila and Doz [7], Saudi et al [8], Marques [5] and others, experimental modal information is used for calibration of numerical finite element models of the stands. The calibrated models have proved to be especially useful in the study of reinforcement interventions [8], in the design of vibration control systems [5], identification of structural damage [7] and for simulation of load scenarios different from those normally acting with the structure in normal operation.…”

Section: Introductionmentioning

confidence: 99%

“…The calibrated models have proved to be especially useful in the study of reinforcement interventions [8], in the design of vibration control systems [5], identification of structural damage [7] and for simulation of load scenarios different from those normally acting with the structure in normal operation.…”

Section: Introductionmentioning

confidence: 99%