Optimization of MR Dampers for Wind-Excited Benchmark Tall Building

Suthar, Sameer J.; Patil, Veeranagouda; Jangid, R. S.

doi:10.1061/(asce)sc.1943-5576.0000733

Cited by 9 publications

(3 citation statements)

References 49 publications

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“…When there is current present, these particles polarize and increase flow resistance, converting viscous fluid into a yielding solid in milliseconds. Electromagnets situated inside the piston head of the MR dampers, which are magnetic counterparts of ER dampers, produce the magnetic field [ 185 , 186 , 187 , 188 , 189 , 190 ]. However, only MR fluids have been demonstrated to be tractable for applications in civil engineering [ 170 ].…”

Section: Active Controlmentioning

confidence: 99%

Review of Vibration Control Strategies of High-Rise Buildings

Ouni

Abdeddaim

Elias

et al. 2022

Sensors

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Since the early ages of human existence on Earth, humans have fought against natural hazards for survival. Over time, the most dangerous hazards humanity has faced are earthquakes and strong winds. Since then and till nowadays, the challenges are ongoing to construct higher buildings that can withstand the forces of nature. This paper is a detailed review of various vibration control strategies used to enhance the dynamical response of high-rise buildings. Hence, different control strategies studied and used in civil engineering are presented with illustrations of real applications if existing. The main aim of this review paper is to provide a reference-rich document for all the contributors to the vibration control of structures. This paper will clarify the applicability of specific control strategies for high-rise buildings. It is worth noting that not all the studied and investigated methods are applicable to high-rise buildings; a few of them remain limited by many parameters such as cost-effectiveness and engineering-wise installation and maintenance.

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Section: Active Controlmentioning

confidence: 99%

Review of Vibration Control Strategies of High-Rise Buildings

Ouni

Abdeddaim

Elias

et al. 2022

Sensors

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“…The magnetorheological damper (MRD) is one of the typical representatives of semi-active dampers, and it can control the magnitude of magnetic induction through the external excitation current, thereby adjusting the dynamic shear yield stress of magnetorheological fluid (MRF), so as to achieve the effect of tunable damping characteristics. Due to its fast response speed and low power consumption [3][4][5][6], it has been extensively used in low-frequency vibration fields, such as automotive suspension [7][8][9][10][11], buildings [12][13][14][15][16], bridges [17][18][19][20], prosthetics [21][22][23][24][25], etc.…”

Section: Introductionmentioning

confidence: 99%

Dual-stage theoretical model of magnetorheological dampers and experimental verification

Lei,

Li,

Zhou

et al. 2024

Smart Mater. Struct.

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The theoretical model for predicting the damping characteristics of magnetorheological dampers (MRDs) not only facilitates the optimization of MRD parameters, but also provides assistance for the theoretical design of MRDs. However, some existing models have limitations in fully characterizing the damping characteristics of MRDs. In this paper, the workingstageof MRDs was categorized into yield and pre-yield stages based on whether the internal magnetorheological fluid (MRF) attains the dynamic shear yield state or not, and the Herschel-Bulkley model with pre-yield viscosity(HBPV) and improved polynomial model (IPOL) were employed to respectively characterize the yield and pre-yield stages of MRDs. Subsequently, the HBPV-IPOL model was proposed to characterize the complete damping characteristics of MRDs in low-frequency vibration conditions, with considering the local loss effect of the fluid in the model. To accurately characterize the magnetic induction intensity in the MRD damping channel, employing the steady-state finite element method (FEM) for magnetic field analysis; on this basis, dividing the damping channel to investigate the variation trends of the magnetic induction intensity in different regions. Simultaneously, the zero-field region hypothesis was proposed to quantitatively consider the influence of minute magnetic induction intensity in the traditional zero-field regions on the damping characteristics of MRDs. Finally, integrating the impact trends of currents in different regions, and employing the HBPV model to determine the impact magnitude of each region within the damping channel on the damping characteristics of the MRD in the yield stage. In the pre-yield stage, Polynomial curves were fitted to experimental damping force-velocity curves, and the obtained polynomials were employed to predict the damping characteristics. Extensive experiments have been conducted on MRD samples to assess the predictive performance of the model on MRD damping characteristics under sinusoidal displacement excitation vibration conditions with different excitation currents, vibration frequencies and vibration amplitudes.

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“…One solution to break this dilemma is to supplement damping by installing energy dissipation devices in tall buildings, which has been vastly studied. 8,9 For instance, active tuned mass dampers, 10 tuned liquid sloshing dampers, 11 and magnetorheological (MR) dampers 12 have been applied to reduce wind-induced vibration in a benchmark tall building. Nevertheless, the typical arrangements of dampers in tall buildings are either ineffective because of the relatively small inter-story drift or too costly due to the mass and space requirement for a big unit on the top of the buildings.…”

Section: Introductionmentioning

confidence: 99%

Frequency domain-based analytical framework for seismic performance of viscously damped outrigger systems based on continuous Timoshenko beam theory

Fang

2023

Journal of Low Frequency Noise, Vibration and Active Control

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This paper proposes a frequency domain-based analytical framework for seismic performance of viscously damped outrigger systems. Based on a core–outrigger–damper–column simplified model, the global dynamic stiffness matrix is assembled from the core modeled as a Timoshenko beam, damped outriggers as complex rotational stiffness comprising outriggers, dampers, and perimeter columns, and inherent damping using Leung’s theory and modal damping construction. A general numerical method combining Wittrick-Williams algorithm and Newtonian iteration is developed to study the dynamic characteristic of such systems with multiple damped outriggers. The fast Fourier transformation (FFT) and the inverse Fourier transformation (IFFT) are then integrated with the principle of potential energy to obtain the equivalent nodal force and thus the time history response by transformations between time and frequency domains. Finally, the stochastic analysis is conducted via the transfer function resulting from the global stiffness matrix with the stochastic seismic excitation following Kanai-Tajimi spectrum. The proposed approach is verified by comparison with the finite element method through a case study of a tall building implemented with viscously damped outriggers. This study shows that the proposed analytical framework could serve as a powerful tool for evaluating the performance of viscously damped outrigger systems.

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Optimization of MR Dampers for Wind-Excited Benchmark Tall Building

Cited by 9 publications

References 49 publications

Review of Vibration Control Strategies of High-Rise Buildings

Review of Vibration Control Strategies of High-Rise Buildings

Dual-stage theoretical model of magnetorheological dampers and experimental verification

Frequency domain-based analytical framework for seismic performance of viscously damped outrigger systems based on continuous Timoshenko beam theory

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