Aerodynamic study of slotted box girder using computational fluid dynamics

Watanabe, Shigeru; Fumoto, Koichiro

doi:10.1016/j.jweia.2008.02.056

Cited by 21 publications

(7 citation statements)

References 3 publications

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“…The results of these studies indicated the ability of LES to evaluate steady and unsteady features of the flow, including an accurate description of wind load spectra (Figure ). In particular, in Zhang et al paper, the analysis of wind‐induced vibrations was performed by coupling CFD and structural modal analysis proving good agreement with maximum displacements of the wind‐excited structure. Other successful application includes Sarwar et al and Watanabe and Fumoto, where LES analyses of flow around bridge section were performed proving good agreement with the experimental results both on steady and unsteady characteristics, and, where the flow field around a large roof was studied and mean and rms pressure coefficients was correctly evaluated.…”

Section: Turbulence Models For Cfdmentioning

confidence: 86%

Critical review of turbulence models for CFD for fatigue analysis in large steel structures

Lorenzon

Antonello

Berto

2018

Fatigue Fract Eng Mat Struct

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The determination of wind‐induced fatigue load in large structures and buildings with complex geometries, which do not fall in typical cases of building codes and standards, represents a consuming task, and it is usually evaluated through the aid of wind tunnel tests, while computational approaches do not yet have a large application. The practical use of computational fluid dynamics (CFD) techniques in civil engineering applications has in fact been rare outside the framework of steady‐state analyses, because of the limitations of RANS approaches and of the higher cost of LES, but with the increase in computing resources and with the introduction of new and more efficient turbulence models, the practical use of CFD to evaluate fluctuating features of wind flow is much more feasible now. With it, it is possible to foresee the possibility for the evaluation of wind‐induced fatigue loads in steel structures by using CFD. This paper has the purpose to discuss the feasibility of a procedure that uses CFD as the first step in a chain of numerical simulations that leads to the fatigue calculation of a large, complex structure. The state of the art of turbulence models for CFD is here shown by performing literature review, with particular attention to their application to case studies related to large steel structures. A special focus in this paper lies in the use of PANS models, which reduce computational cost and grid sensitivity compared with LES, while providing comparable accuracy.

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Section: Turbulence Models For Cfdmentioning

confidence: 86%

Critical review of turbulence models for CFD for fatigue analysis in large steel structures

Lorenzon

Antonello

Berto

2018

Fatigue Fract Eng Mat Struct

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“…Two different barriers heights, h, have been considered so that the height ratios h=H equals to 0.5 and 1.0. The windshield net porosity ratio of 50% is obtained by introducing piles of rectangular cylinder at equal intervals [30]. The fence is arranged in two alignments on the top of the decks so that x=L ¼ À0:4 and x=L ¼ 0:4.…”

Section: Windshield Barriers Effectsmentioning

confidence: 99%

Numerical study of a twin box bridge deck with increasing gap ratio by using RANS and LES approaches

Miranda

Patruno

Ricci

et al. 2015

Engineering Structures

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“…Large Eddy Simulation (LES) model is an important turbulent model of CFD which can calculate wind field around bluff bodies and complicated buildings with rather high precision. Simulation of the wind environment of tall buildings and the air flow around a long-span bridge deck have been carried out successfully by using LES turbulent models (Selvam et al, 1998;Watanabea and Fumotob, 2008).…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental study on wind environment at near tower region of a bridge deck

Zhou

Zhu

2020

Heliyon

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The Large Eddy Simulation (LES) turbulence model was used to investigate the wind environment over the deck near bridge tower and was verified using the wind tunnel tests. Compared with the wind tunnel tests, the computational fluid dynamics (CFD) approach was more convenient for the investigations of the local wind field. It was found that the influence of bridge tower on the wind flow can increase rapidly the wind speed on vehicles while bearing off a narrow zone near the tower. The dangerous situation can be effectively compromised by installing a proper local windshield barrier (WSB) with varying heights and porosity ratios along the bridge span. The length of the influence region of tower on the wind environment over the bridge deck was about 7 times of the tower width, implying a proper length of local windshield barriers on each side of the tower. Parametric studies demonstrated that the length of local WSB with different porosity ratios could affect the slope of equivalent wind speeds, indicating that the shorter the length of local WSB was, the rapider the wind speed of the tower influence region varied.

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Aerodynamic study of slotted box girder using computational fluid dynamics

Cited by 21 publications

References 3 publications

Critical review of turbulence models for CFD for fatigue analysis in large steel structures

Critical review of turbulence models for CFD for fatigue analysis in large steel structures

Numerical study of a twin box bridge deck with increasing gap ratio by using RANS and LES approaches

Numerical and experimental study on wind environment at near tower region of a bridge deck

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