Framework for structural damping predictor models based on stick-slip mechanism for use in wind-resistant design of buildings

Aquino, Ronwaldo Emmanuel R.; Tamura, Yukio

doi:10.1016/j.jweia.2013.04.001

Cited by 19 publications

(4 citation statements)

References 17 publications

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“…So we can see that, compared to the results in still air, these two parameters will rise with the wind speed, then will decline after reaching the maximum value. This changing law is consistent with article [10], and that about the aerodynamic damping also meshes with article [11]. Note: '0' indicate the still air.…”

Section: Identification Methods For the Added Mass And Aerodynamic Damsupporting

confidence: 89%

The identification of added mass and aerodynamic damping using HHT method under wind action

Sun¹,

Hu²

2017

Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)

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Abstract. For the long-span roof structures which have relatively low frequency and light mass, the vibration property under the action of fluctuating wind is significantly influenced by the added mass and aerodynamic damping. Since the influence can be reflected by the change of structural frequency and damping ratio, the problem can be classified as modal parameter identification. Based on Hilbert-Huang Transform, Empirical Mode Decomposition method is applied on the output signal after IIR band pass filter. Then the Random Decrement Technique is used synchronously on all the components of degree of freedom to obtain the free decay signal of required mode, so the frequency, damping ratio and mode shape can be identified. The results of numerical example show that this method can restrain noise effectively and extract the modal parameters accurately. Taking the Geiger type cable dome as example, the added mass and aerodynamic damping under the action of fluctuating wind was identified according to the principle of highly similar mode shape, and the change law of these two parameters was also obtained compared with still air environment.

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Section: Identification Methods For the Added Mass And Aerodynamic Damsupporting

confidence: 89%

The identification of added mass and aerodynamic damping using HHT method under wind action

Sun¹,

Hu²

2017

Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)

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“…Being aware that the fundamental frequency of the structure along-wind, n 1x , has a value close to the expected frequency of gust loading, 0 f , for the structure with 5 sections, as shown in the Table 8, and considering that in the case of a difference of less than 33% between the expected frequency of gust loading and the fundamental frequency of the structure, the structural dynamic response to those gusts that have a duration close to the fundamental period of the structure becomes an amplification factor which can lead to resonance, phenomenon occurring in any flexible structure under the influence of wind, the paper proposes, in Table 9, the level of safety to be adopted in the installation/dismantling of the towers for the wind turbines considering only the dynamic action of the wind, where the main parameter has a variable governed by probability calculation. 1) averaged over a 10-minute period, determined at a height of 10 m and having annual probabilities of exceedance of 0.02. 2) for regions with peak velocity pressure q b =0.5 according with CR 1-1-4/2012.…”

Section: Discussionmentioning

confidence: 99%

The Dynamic Response of Wind Turbine Generators Flexible Structures to the Turbulent Wind Effect

Boboc

2019

UDJG_MTD

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The high risk of construction-assembly activities, the high costs of leased equipment, the pressure to finish installing/uninstalling as quickly as possible, create an environment conducive to ignoring safety practices, especially if the rules do not become mandatory, even if they are known. The purpose of this article is to analyze the response of a wind turbine metallic tubular tower to wind action when, for various reasons, during operation, dismantling or installation, circumstances can arise that leave the structure to remain in a preserved state in different stages. The dynamic response factor of the structure was evaluated using the Romanian National Design Code and Eurocode 1. The relationships are based on the hypothesis that only the vibrations of the structure in the direction of the wind, corresponding to the fundamental mode of vibration, are significant. Because the structure presented is isolated, high and slender, the article also examines the probability of occurrence of interaction effects between vortex shedding and galloping.

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“…On the other hand, the damping ratio also plays a significant role in the magnitude of the vibration responses of tall buildings. However, due to the complex energy dissipation of tall buildings, the damping ratios tend to be more sophisticated than the other modal parameters, and the identified damping ratio values always involve a much higher variability based on the current full‐scale measurement techniques (COV up to 70%) . In this work, the probabilistic distribution models and uncertainties of the modal frequencies and the damping ratios are identified based on the full‐scale measurement data of the monitored building by the RFBFFT method.…”

Section: Probabilistic Assessment Of Vibration Exceedancementioning

confidence: 99%

“…However, due to the complex energy dissipation of tall buildings, the damping ratios tend to be more sophisticated than the other modal parameters, and the identified damping ratio values always involve a much higher variability based on the current full-scale measurement techniques (COV up to 70%). [48,49] In this work, the probabilistic distribution models and uncertainties of the modal frequencies and the damping ratios are identified based on the full-scale measurement data of the monitored building by the RFBFFT method. Table 5 lists the probabilistic distribution models and the statistics of the major random variables, that is, the modal frequencies, the modal damping ratios of the first three vibration modes, and the design mean wind speed.…”

Section: Figure 11mentioning

confidence: 99%

Probabilistic assessment of vibration exceedance for a full‐scale tall building under typhoon conditions

Huang

et al. 2018

Structural Design Tall Build

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Summary Full‐scale wind and vibration measurements were conducted on a 270‐m tall building in Hong Kong. For the modal identification, a refined fast Bayesian fast Fourier transform method was newly developed by considering the exponential form of the modal wind force spectrum. Then, the modal parameters of the monitored building and their uncertainties were identified from the full‐scale vibration data under typhoon conditions by the proposed refined fast Bayesian fast Fourier transform method. For assessing the vibration exceedance of the monitored building under typhoon, a stochastic wind force field generation technique was developed by combining the spectral representation method and the computational fluid dynamics method. Wind‐induced vibration of the tall building under Typhoon Kammuri was reanalyzed with generated wind force time history data. Finally, a time‐domain Monte Carlo simulation framework was proposed by integrating the modal identification and the stochastic wind force field generation technique. In this framework, the Metropolis–Hastings sampling algorithm was adopted to estimate the vibration exceedance probability, which was defined through a limit state performance function associated with the ISO vibration assessment criteria.

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Framework for structural damping predictor models based on stick-slip mechanism for use in wind-resistant design of buildings

Cited by 19 publications

References 17 publications

The identification of added mass and aerodynamic damping using HHT method under wind action

The identification of added mass and aerodynamic damping using HHT method under wind action

The Dynamic Response of Wind Turbine Generators Flexible Structures to the Turbulent Wind Effect

Probabilistic assessment of vibration exceedance for a full‐scale tall building under typhoon conditions

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