Long-term full-scale measurements of wind induced vibrations of steel stacks

Ruscheweyh, Hans; Langer, W. D.; Verwiebe, C.

doi:10.1016/s0167-6105(98)00070-1

Cited by 12 publications

(4 citation statements)

References 1 publication

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“…where m is the equivalent mass of per unit of length of the prism, S C is the mass-damping parameter (Sc number), S C = 4πmζ r / ρD 2 , St is the Strouhal number of the prism's cross-section, and St = f r D/U, while the last term on right hand side of Equation (5) represents the modal shape correction factor for the vibration amplitude. Equation 5is one of the formulae used in Euro Code to estimate the VIV's maximum amplitude [4,27]. It can be observed from Equation (5) that both the structural and aerodynamic parameters include the Scruton and Strouhal numbers, fluctuating lift coefficient, spanwise correlation, and modal shape correction that affect the maximum VIV amplitude.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The evaluation of VIV responses, especially the maximum amplitude prediction, is one of the most important aspects of the wind-resistant design of flexible structures. Various empirical methods have been proposed and investigated for the prediction of the maximum amplitude owing to VIV [4,5]. Structural mass, damping, Strouhal number, and aerodynamic force coefficients are essential two-dimensional (2D) parameters and are used to predict the VIV amplitudes.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Two-Dimensional and Three- Dimensional Responses for Vortex-Induced Vibrations of a Rectangular Prism

et al. 2020

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The accurate prediction of the amplitudes of vortex-induced vibrations (VIV) is important in wind-resistant design. Wind tunnel tests of scaled section models have been commonly used. However, the amplitude prediction processes were usually inaccurate because of insufficient evaluations of three-dimensional (3D) effects. This study presents experimental measurements of VIV responses in a prototype rectangular prism and its 1:1 two-dimensional section model in smooth flow. The results show that the section model vibrates with the same Reynolds number, equivalent mass, frequency, and damping ratio as those of the prototype prism without scale effects. The VIV amplitudes can be qualitatively and quantitatively measured and analyzed. The measured VIV lock-ins of these two models agree with each other. However, the prototype prism produces a 20% higher maximum amplitude than the section model. Several classical VIV mathematical models are used to validate the wind tunnel test results. This confirms that the 3D coupling effects of the modal shape and the imperfect correlations of excitation forces positively contribute to the maximum amplitude. Based on the section model outcomes, the amplified factor of 1.2 is found to be appropriate for the amplitude prediction of VIV for the present prism, and it can also provide a reference for other structures.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of Two-Dimensional and Three- Dimensional Responses for Vortex-Induced Vibrations of a Rectangular Prism

et al. 2020

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“…Ruscheweyh [80] Miyashita et al, [82] showed that the effects of a tuned active damper upon wind-induced vibrations of the Hamamatsu ACT Tower and its structural characteristics are clear. Structural damping of steel lighting towers has been estimated through full scale experiments by Pagnini and Solari [83].…”

Section: Wind-tunnel Testmentioning

confidence: 99%

Time-Domain Model for Predicting Aerodynamic Loads on a Slender Support Structure for Fatigue Design

2010

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“…Ruscheweyh [80] presented the amplitude caused by cross-wind vibrations from long-term fullscale testing of four steel stacks. With the collected behavior data, fatigue calculations were made based on the Eurocode and were compared with the constant amplitude method.…”

Section: Full-scale Measurementsmentioning

confidence: 99%

A time-domain model for predicting aerodynamic loads on a slender support structure for fatigue design

Chang

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First of all, I owed much of my graduate work to my wife, Hyesun Cheong, for her endless love and assistance. This appreciation should be extended to my sons, Eugene Chang and Justin Chang, for that they grows up very well without any significant problems during my study. The successful completion of this dissertation and the research discussed herein would not have been possible without the guidance and support of my graduate advisors, Dr. Brent M.

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Long-term full-scale measurements of wind induced vibrations of steel stacks

Cited by 12 publications

References 1 publication

Comparison of Two-Dimensional and Three- Dimensional Responses for Vortex-Induced Vibrations of a Rectangular Prism

Comparison of Two-Dimensional and Three- Dimensional Responses for Vortex-Induced Vibrations of a Rectangular Prism

Time-Domain Model for Predicting Aerodynamic Loads on a Slender Support Structure for Fatigue Design

A time-domain model for predicting aerodynamic loads on a slender support structure for fatigue design

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