Influence of tuning of passive TLD on the seismic vibration control of elevated water tanks under various tank-full conditions

Roy, Atanu; Ghosh, Aparna; Chatterjee, Satyajit

doi:10.1002/stc.1924

Cited by 15 publications

(8 citation statements)

References 27 publications

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“…The large displacement, however, may lead to the adjacent equipment damage, because they are connected with each other by cables. In general, the tuned liquid damper (TLD) and the tuned liquid column damper (TLCD) as passive devices are capable of reducing the displacement and acceleration at the top of the structure and have been widely used for structure control. The effectiveness of TLD and TLCD in mitigating the structural vibration in engineering such as the high‐rise steel structure, the nuclear power plant, the bridge, and the jacket offshore platform had been verified.…”

Section: Introductionmentioning

confidence: 99%

Sloshing characteristics of annular tuned liquid damper (ATLD) for applications in composite bushings

Yue

Chen

2018

Struct Control Health Monit

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Summary It is of great significance to conduct seismic qualification and mitigation for composite bushing, whose damage may cause massive power outage and huge cost of repair. In this paper, the annular tuned liquid damper (ATLD), utilizing the sloshing characteristics of transformer oil in the dome, is proposed to reduce the seismic responses of the composite bushing. As to the annular feature of the metallic dome, the simplified formulas for calculating the liquid sloshing frequencies in the dome are derived based on the linear wave theory, which provides a direct and fast way for the predesign of ATLD. Comparing with the experimental results reported in literature, the accuracy and applicability of the proposed formulas are verified. In addition, parametric studies of the first 3 sloshing frequencies including liquid height and the outer and the inner radii are carried out. The optimal tuning analysis of vibration reduction in frequency domain is performed on the structure base excitation. The vibration reduction analyses in time domain of the ATLD for the composite bushing subjected to real earthquake records are carried out and discussed simultaneously. It is shown that the simplified formulas presented in this paper provide a convenience for the predesign of ATLD and the optimal ATLD is effective in reducing the vibration of the composite bushing.

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Section: Introductionmentioning

confidence: 99%

Sloshing characteristics of annular tuned liquid damper (ATLD) for applications in composite bushings

Yue

Chen

2018

Struct Control Health Monit

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“…The performance of the proposed TMD with a conical spring is demonstrated through the example of seismic vibration control of an elevated circular reinforced concrete water tank with shaft support. Pertinent data of the example are taken from Roy et al (2016). The plan and elevation of the water tank are given in Figure 6(a) and (b), respectively.…”

Section: Model Descriptionmentioning

confidence: 99%

A novel tuned mass-conical spring system for passive vibration control of a variable mass structure

Chakraborty

Ghosh²,

Ray-Chaudhuri

2021

Journal of Vibration and Control

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This article presents the design of a tuned mass damper with a conical spring to enable tuning to the natural frequency of the system at multiple values, as may be convenient in case of a system with fluctuations in the mass. The principle and design procedure of the conical spring in the context of a varying mass system are presented. A passive feedback control mechanism based on a simple pulley-mass system is devised to cater to the multi-tuning requirements. A design example of an elevated water tank with fluctuating water content, subjected to ground excitation, is considered to numerically illustrate the efficiency of such a tuned mass damper associated with the conical spring. The conical spring is designed based on the tuning requirements at different mass conditions of the elevated water tank by satisfying the allowable load bearing capacity of the spring. Comparisons are made with the conventional passive tuned mass damper with a linear spring tuned to the full tank condition. Results from time history analysis reveal that the conical spring-tuned mass damper can be successfully designed to remain tuned and thereby achieve significant response reductions under stiffening conditions of the primary structure, whereas the linear spring-tuned mass damper suffers performance degradation because of detuning, whenever there is any fluctuation in the system mass.

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“…The procedures for numerical simulation and evaluation of TSD base shear are as followed in Banerji et al. (2000) and Roy et al. (2017).…”

Section: Modeling Of Structure–tsd System and Equations Of Motionmentioning

confidence: 99%

“…The tuned sloshing damper (TSD) is a well-established vibration control device that has been used to study mitigation of structural responses due to various environmental excitations from wind, waves, and earthquake (Lee and Reddy, 1982; Kareem, 1990; Modi and Seto, 1997; Banerji et al., 2000; Jin et al., 2007; Nanda and Biswal, 2011; Murudi and Banerji, 2012; Roy et al., 2017). There have been a number of practical implementations of TSDs, chiefly for wind-excited tall buildings, airport towers, commercial towers, skyscrapers, and bridges (Tamura et al., 1995; Soong and Dargush, 1997; Malekghasemi et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

On the nonlinear performance of a tuned sloshing damper under small amplitude excitation

Roy

Zhang

Ghosh

et al. 2019

Journal of Vibration and Control

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This paper explores the potential of a tuned sloshing damper (TSD) in the control of small amplitude vibrations, which is often important from serviceability considerations, through the use of a relatively small mass ratio of the damper liquid. To investigate the nonlinear behavior of the TSD, real-time hybrid testing is conducted in which a single rectangular tank containing water constitutes the prototype TSD. The structure is modeled as a multi-degree-of-freedom system. Two different base input motions, namely harmonic and synthetically generated broad-banded input, are considered. The sensitivity of the TSD performance to tuning ratio vis-à-vis low mass ratio is studied. The experimental results are compared with those obtained from a numerical study carried out using the shallow water wave theory-based nonlinear, semi-empirical model, for the simulation of the sloshing motion of the TSD liquid (water). Results indicate that in the tuned condition, even with a low mass ratio, the TSD is highly effective in the suppression of the small amplitude vibrations, which is underestimated by the simulation model.

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Influence of tuning of passive TLD on the seismic vibration control of elevated water tanks under various tank-full conditions

Cited by 15 publications

References 27 publications

Sloshing characteristics of annular tuned liquid damper (ATLD) for applications in composite bushings

Sloshing characteristics of annular tuned liquid damper (ATLD) for applications in composite bushings

A novel tuned mass-conical spring system for passive vibration control of a variable mass structure

On the nonlinear performance of a tuned sloshing damper under small amplitude excitation

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