Performance of Distributed Multiple Viscoelastic Tuned Mass Dampers for Floor Vibration Applications

Nguyen, T. H.; Saidi, I.; Gad, Emad; Wilson, John L.; Haritos, N

doi:10.1260/1369-4332.15.3.547

Cited by 24 publications

(17 citation statements)

References 14 publications

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“…MTMD is composed of a series of distributed TMDs, thus the modeling of the MTMD can be transferred to the simulation of several TMDs. Since there is no element of TMD included in ANSYS, the simulation of a TMD herein takes on the advantages of Mass21 and Combin14 (Gu et al, 2001;Nguyen et al, 2012). The mass blocks of the TMDs are simplified into individual masses by the element Mass21 in ANSYS.…”

Section: Finite Element Modeling Of the Mtmdmentioning

confidence: 99%

“…Following preliminary investigation of MTMD, Kareem and Kline (1995) investigated its effectiveness under narrow or wide banded excitations. Nguyen et al (2012) conducted experimental and numerical studies on the performance of a custom-made distributed multiple viscoelastic TMD system in suppressing the vibration level on an actual office floor subjected to various types of excitations. However, most of the researches on structural vibration control using the empirical spectrum formula to simulate the excitation, inevitably would deviate from real conditions and cause errors in analytical results.…”

Section: Introductionmentioning

confidence: 99%

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A simulation study on the optimal control of buffeting displacement for the Sutong Bridge with multiple tuned mass dampers

Wang

Tao

Cheng

et al. 2014

J. Zhejiang Univ. Sci. A

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The buffeting of long-span cable-supported bridges under strong winds is one of the key issues in bridge wind engineering. In order to study the effectiveness of the multiple tuned mass dampers (MTMDs) in buffeting control of long-span bridges, the Sutong Cable-stayed Bridge (SCB) with a main span of 1088 m in China is taken as an example in this paper. The spatial finite element model of the SCB is established and the modal analysis is conducted based on ANSYS. After the 3D turbulence wind field of the SCB is simulated using the measured wind parameters, the time-domain buffeting analysis on the SCB is conducted with the aerodynamic self-excited forces included. According to the dynamic characteristics and the time-domain buffeting analysis results of the SCB, the parameter sensitivity analysis on buffeting vibration control with MTMD is conducted in ANSYS. The optimum parameters are then obtained with the construction difficulty and economic factors considered. Results show that the control efficiency is sensitive to the number of the TMD, mass ratio, frequency band-width ratio, and damping ratio. Both the vertical and the lateral vibrations can be effectively controlled when proper design parameters of a MTMD system are used. In addition, the control effect on lateral vibration is better than that on vertical vibration. Results obtained in this study can provide references for anti-wind design and buffeting control of long-span cable-stayed bridges.

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Section: Finite Element Modeling Of the Mtmdmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A simulation study on the optimal control of buffeting displacement for the Sutong Bridge with multiple tuned mass dampers

Wang

Tao

Cheng

et al. 2014

J. Zhejiang Univ. Sci. A

View full text Add to dashboard Cite

show abstract

“…Over the last several decades, the development of analysis software and construction materials has resulted in a trend towards more slender and long-span structures, characterised by low fundamental frequencies and damping ratios, and consequently more sensitive to vibration problems [12,26,28,32,41]. People exposed to an excessive vibration environment tend to have uncomfortable feelings, which particularly affects the serviceability of buildings such as hospitals, factories and laboratories where vibration-sensitive machines/apparatus is involved.…”

Section: Introductionmentioning

confidence: 99%

Simulations of human-induced floor vibrations considering walking overlap

et al. 2019

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Floor vibration induced by human activities has become an important concern to both designers and developers, especially for modern structures designed with larger spans and lower weights. However, there is currently no systematic approach in codes of practices to assessing floor vibration, and the load models induced by human walking are usually oversimplified by ignoring overlapping between successive footfalls. This paper addresses those shortcomings by conducting a series of finite element simulations of three slabs with different thicknesses subjected to dynamic loads induced by human walking activities. A total of six load models ranging from the most realistic to the most simplified were used for the simulations. The simulation results show that the overlapping time between successive footfalls has a significant impact on human-induced vibration for floors with thicknesses of 100-200 mm. The results also indicate that the critical walking frequency should be shifted to a higher value than the resonant frequency, to allow for the humaninduced load increasing with walking frequency.

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“…The optimization method for determining MTMD’s parameters, however, was not clearly presented. Nguyen et al (2012) studied the performance of an MTMD plan in suppressing human-induced vibration on a real office floor. The MTMD parameters were achieved by minimizing the dynamic magnification factor of an SDOF-MTMD system under harmonic excitation.…”

Section: Introductionmentioning

confidence: 99%

A hybrid approach for parameter optimization of multiple tuned mass dampers in reducing floor vibrations due to occupant walking: Theory and parametric studies

Chen

Zhu

2017

Advances in Structural Engineering

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This article presents a hybrid approach for determining optimal parameters of multiple tuned mass dampers to reduce the floor vibration due to human walking. The proposed approach consists of two parts. The first one is a partial mode decomposition algorithm to efficiently calculate dynamic responses of the coupled floor–multiple tuned mass damper system subjected to moving walking loads. The second one is an adaptive genetic simulated annealing method for the optimization of multiple tuned mass damper parameters. To establish optimization, certain variables must be considered. These include the mass, natural frequency, and damping ratio of each tuned mass damper in a multiple tuned mass damper system. The objective is to minimize floor responses and remove unreasonable requirements, such as uniform mass distribution and symmetric distribution of the tuned mass damper frequency. The proposed hybrid approach has successfully been applied to optimize the multiple tuned mass damper system to reduce the vibration of a long-span floor with closely spaced modes. By the hybrid approach, an extensive parametric study has been carried out. The results show that different walking load models and uncertainties in the dynamic properties of the floor and each tuned mass damper itself can affect the overall performance of the multiple tuned mass damper system. The proposed hybrid optimization approach is very effective and the resulting multiple tuned mass damper system is robust in reducing floor vibrations under various conditions.

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Performance of Distributed Multiple Viscoelastic Tuned Mass Dampers for Floor Vibration Applications

Cited by 24 publications

References 14 publications

A simulation study on the optimal control of buffeting displacement for the Sutong Bridge with multiple tuned mass dampers

A simulation study on the optimal control of buffeting displacement for the Sutong Bridge with multiple tuned mass dampers

Simulations of human-induced floor vibrations considering walking overlap

A hybrid approach for parameter optimization of multiple tuned mass dampers in reducing floor vibrations due to occupant walking: Theory and parametric studies

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