Tuned Sloshing Dampers in Tall Buildings: A Practical Performance-Based Design Approach

Love, J.S.; Morava, B.; Robinson, J. K.; Haskett, T. C.

doi:10.1061/(asce)sc.1943-5576.0000582

Cited by 9 publications

(2 citation statements)

References 32 publications

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“…This methodology has also been used by [19] to develop a preliminary design method for TLDs conforming to space restrictions. More recently, a practical performance-based design approach was developed by [20] which is based on the work by [12]. In this study, the methodology proposed by [12] is adopted to calculate the optimal parameters of the TLDs.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation to Evaluate the Dynamic Properties of a Scaled Rectangular Tuned Liquid Damper Using High-Speed Videos

Nava-González,

Pozos-Estrada,

Gómez-Martínez

et al. 2024

Buildings

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The use of tuned liquid dampers (TLDs) as an alternative to reduce the response of flexible structures with a low amount of structural damping is a viable option. The correct characterization of the dynamic properties of the TLD plays an important role in the performance of the TLD-main structure system. This work presents the results of an experimental study to evaluate the dynamic properties of a scaled rectangular TLD using high-speed videos. For the experimental investigation, a scaled rectangular TLD is subjected to lateral displacement of the sinusoidal type with amplitudes that range from 5 to 40 mm and frequency equal to 0.625 Hz. The dynamic properties of the TLD system are identified with the use of high-speed videos with a duration of 28.96 s and recorded at 500 frames per second (fps). The recorded videos are analyzed with the software Tracker to extract time histories of wave elevation at predefined locations. The frequency and damping of the TLD system are identified from the time histories of wave elevation through Fourier analysis and free-vibration decay. The findings of this study revealed that the identified dynamic properties of the TLD by using high-speed videos presented small differences with respect to the target values, with errors that range from 0.93 to 2.9% for frequency and from 1.6 to 8.8% for damping, indicating that the use of high-speed videos can be an alternative to evaluate the dynamic properties of TLD systems.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation to Evaluate the Dynamic Properties of a Scaled Rectangular Tuned Liquid Damper Using High-Speed Videos

Nava-González,

Pozos-Estrada,

Gómez-Martínez

et al. 2024

Buildings

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“…Generally speaking, wind-induced vibrations can be reduced in three different ways: (1) by changing the stiffness or mass, (2) by increasing the damping with passive or active control devices [3][4][5][6][23][24][25][26], and (3) by reducing wind loads with aerodynamic shapes such as tapering. e fact that a tapered tall building might spread the vortex shedding over a broad range of frequencies makes it more effective for reducing across-wind responses has been established [27].…”

Section: Introductionmentioning

confidence: 99%

Analytical Simulation of 3D Wind-Induced Vibrations of Rectangular Tall Buildings in Time Domain

Huergo

Hernández-Barrios

2022

Shock and Vibration

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The Monte Carlo simulation method for along-wind loads on tall buildings performed in the time and space domain may be the only analytical viable option for specific problems such as nonlinearity behavior, nonclassically damping, and detailed structural models in commercial software. However, both across-wind and torsional-wind loads due to vortex shedding are not usually simulated in time domain because the vertical decay constants are unknown or the empirical coherence functions cannot be applied in Monte Carlo simulation methods. In this paper, the spectral representation (SR) method is used to simulate in time domain the along-wind, across-wind, and torsional-wind loads on rectangular tall buildings considering the vertical correlation between the signals. The Krenk root-coherence function is used for the normalized cross-spectrum on the along-wind direction, whereas the Davenport root-coherence function is used for the other two types of wind loads. For both across-wind and torsional-wind loads, the Davenport root-coherence function was assessed at the vortex shedding frequency by changing the vertical decay constants until converge between the Davenport model and the Liang empirical coherence model was achieved. Based on a three‐dimensional model with two translational and one torsional degree of freedom for each floor, the proposed vertical decay constants were validated by comparing the elastic response between frequency domain and time domain approaches. Generally speaking, the results show that peak displacements are significantly underestimated for both across-wind and torsional directions when vertical correlation is neglected. In addition, the advantages of time domain simulation were shown by performing a nonlinear time history analysis considering a bilinear isotropic material hardening model in both translational directions.

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Development of Fragility Curves for Tall Buildings with Tuned Liquid Dampers for Vibration Control Under Wind Loading

Nava-González,

Pozos-Estrada,

López-Ibarra

2024

Int J Civ Eng

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In this study, fragility curves of a tall building subjected to along-wind loads are developed to evaluate the enhancement in reliability when a Tuned Liquid Damper (TLD) system is employed. For the analysis, a mathematical model of a tall building is designed and subjected to along-wind loads simulated with an autoregressive and moving-average (ARMA) model that includes spatial and temporal variations in the turbulent wind component. For comparison purposes, fragility curves of the tall buildings fitted with a Tuned Mass Damper (TMD) system are also developed. To develop the fragility curves, predefined wind-induced acceleration thresholds are employed as damage states. The numerical results indicate that the use of optimal TLD or TMD systems is effective at reducing the wind-induced acceleration for different mean wind speeds. In addition, the auxiliary damping systems are more effective at reducing the probability of exceedance as the percentage of individuals who perceive acceleration increases from 10 to 50%. Finally, the highest reliability enhancement with the use of both damping systems is achieved for mean wind speed values ranging from 41 to 62 m/s for the damage states considered.

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Tuned Sloshing Dampers in Tall Buildings: A Practical Performance-Based Design Approach

Cited by 9 publications

References 32 publications

Experimental Investigation to Evaluate the Dynamic Properties of a Scaled Rectangular Tuned Liquid Damper Using High-Speed Videos

Experimental Investigation to Evaluate the Dynamic Properties of a Scaled Rectangular Tuned Liquid Damper Using High-Speed Videos

Analytical Simulation of 3D Wind-Induced Vibrations of Rectangular Tall Buildings in Time Domain

Development of Fragility Curves for Tall Buildings with Tuned Liquid Dampers for Vibration Control Under Wind Loading

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