Tuned liquid dampers for controlling earthquake response of structures

Banerji, P.; Murudi, Mohan M.; Shah, A. H.; Popplewell, N.

doi:10.1002/(sici)1096-9845(200005)29:5<587::aid-eqe926>3.0.co;2-i

Cited by 139 publications

(43 citation statements)

References 14 publications

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“…With this second approach, not only the natural period of the structure is considered; the damping characteristics, inertia and restoring terms are also relevant in the dynamic analysis. Real motions of the structure are the outcome of this process and such motions can be compared with design limit states, for instance (Banerji et al 2000, Frandsen 2005, Delorme et al 2006, Attari andRofooei 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Modelling TLDs fluid responses has been conducted using a range of approaches mostly based on mechanical analogies (Tait and Deng 2008), potential flow models of the free surface fluid flow (Frandsen 2005, Attari and Rofooei 2008, Ikeda and Nakagawa 1997, Ikeda 2003 or most commonly, non-linear shallow water wave theory (Sun and Fujino 1994, Reed et al 1998, Banerji et al 2000, Tait et al 2005. None of these has tried to properly model the effects of breaking waves on increasing the dampening effects of the TLD devices.…”

Section: Introductionmentioning

confidence: 99%

“…Sun and Fujino (1993) proposed an analytical model for a TLD in which the breaking waves effects were considered by empirical corrections to the response. This model was later used by Banerji et al (2000) who studied the particularities of strong earthquakes motions to find that a larger liquid-mass to structure-mass ratio is required for a TLD to remain effective as structural damping increases. In the field of civil engineering TLDs are mostly based on the forcé generated by partially filled tanks as a consequence of an imposed rectilinear (mostly horizontal with respect to the gravitational acceleration) motion.…”

Section: Introductionmentioning

confidence: 99%

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Smoothed particle hydrodynamics (SPH) simulation of a tuned liquid damper (TLD) with angular motion

Bulian¹

2009

JHR

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The roll motion response of a single degree of freedom (SDOF) structural system to which a rigid rectangular partially filled liquid tank has been attached is considered. The SDOF structural system with the empty tank is first described with a mathematical model and this model is validated by performing decay experiments as well as experiments in which periodic excitations are applied to the system. The responses are accurately predicted by the model. The accuracy of these predictions allows us to study both experimentally and numericaily, with weakly compressible SPH, the performance of the partially filled tank as a tuned liquid damper (TLD). The sloshing flows inside the tank comprise the onset of breaking waves which make the TLDs devices extremely difficult to model, especially for the potential flow multimodal approaches commonly used to simúlate these sorts of coupled systems. In order to characterise the wave breaking effects on the response curves, tests have been performed with liquids of different viscosity, the increasing viscosity preventing the onset of breaking waves. The capabilities of SPH to treat this coupling problem are assessed and the results show that SPH is able to capture a substantial part of the physics involved in the addressed phenomena but further work remains still to be done relating to a more accurate treatment of the laminar viscosity and turbulence effects. RESUME La réponse en roulis d'un systéme a un degré de liberté (SDOF), auquel est fixée une cuve rectangulaire partiellement remplie de liquide, est étudiée dans cet article. Dans une premiére partie, un modele mathématique est proposé pour le systéme SDOF, calibré a l'aide de résultats expérimentaux d'oscillations libres et forcees, avec une excitation périodique. La réponse du systéme est reproduite avec precisión par le modele. L'efficacité de la cuve en tant qu' amortisseur liquide (TLD) est ensuite analysée expérimentalement et numériquement en utilisant la méthode de simulation SPH. Pour résoudre ees problémes de couplage, des méthodes basées sur la théorie du potentiel sont généralement utilisées. Dans le cas présent, leur utilisation est limitée a cause de la formation de vagues déferlantes lors du ballotement du liquide dans la cuve. Une plus grande viscosité du liquide réduisant la formation de ees vagues, des expériences ont été effectuées avec des liquides de différentes viscosités pour quantifier l'impact des déferlantes sur la réponse globale du systéme couplé. La capacité de la méthode SPH pour résoudre ce probléme est discutée et les résultats montrent que les principaux phénoménes physiques sont reproduits avec SPH. Cependant, des travaux restent nécessaires quant au traitement de la viscosité laminaire et a la partie turbulente de l'écoulement.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Smoothed particle hydrodynamics (SPH) simulation of a tuned liquid damper (TLD) with angular motion

Bulian¹

2009

JHR

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“…That is, the liquid tank can be used as a damper that the proper tuned liquid tank may mitigate earthquake and wind induced vibration of tall building or long span bridge. Therefore, a liquid tank is also frequently used as a TLD to reduce possible violent oscillation of the structures (Banerji et al [1][2], Sun et al [3], Reed et al [4], Fujino et al [5], and Marivani and Hamed [6]). The simple idea is the sloshing frequency of the liquid in a tank can be tuned to give a desired reaction to reduce the vibration of the structures attached with liquid tanks.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of vortex evolution in a 2D baffled tank

Faltinsen

Chen

2016

Computers & Mathematics with Applications

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When the baffle height is small (db ≤ 0.2 d0), the vortex size mainly grows in the horizontal direction.Instead, the vortex size dominantly develops in the vertical direction as db ≥ 0.3 d0. The period of the generation and shedding of vortices near the baffle tip is nearly about one half of the excitation period of the tank. The dynamics of vortex evolution is closely related to the growth and the hydrodynamic interaction of the vortices and sensitively depends on the baffle height, liquid depth, excitation frequency, and excitation displacement of the tank.

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“…The shallow water wave theory has been used incorporating effect of braking of waves which ultimately represents a rectangular TLD as nonlinear model ). Banerji et al (2000) used the formulation suggested by [10] and [3] experimentally found inconsistency in the results which was obtained by using the formulation given by sun et al This was happened due to the lacking of actual prediction of the water surface cause by braking of the waves in the shallow water model. For the solution of this problem Samanta and Banerji (2006) [8] used a various shallow water theory and two numerical schemes, the Lax finite difference method and the random choice method, The response of SDOF system equipped with TLD subjected to severe amplitude harmonic excitation.…”

Section: Introductionmentioning

confidence: 99%

Seismic Protection of Symmetric Building Equipped with Water Sloshing Damper

Asodariya¹,

Patel²

Kalpa Publications in Civil Engineering

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Now a days, in densely populated areas it is desired to have a taller structures which are light in weight and also very flexible. But in real cases the weight is higher thus they are more vulnerable to the environmental load and may lead to collapse of the structure and generate the serviceability problems. Different types of approaches are available to minimize the response of the structure, from the different approaches concept of Tuned Liquid Damper (TLD) is a newer one to reduce the response of the structure. In the TLD, liquid is filled in the tank which reduces the response of the structure using action of liquid sloshing. These TLD dampers are economical as well as less serviceability cost effective passive response reducers, which are being used in the structure having less stiffness and having a low value of damping of structure. In this study, considering Tuned mass damper (TMD) analogy the response of the Single Degree of Freedom (SDOF) system with nonlinear behavior of Tuned sloshing water damper (TSWD was investigated. Four different earthquake ground motion time history like Imperial valley (1940), Loma prieta (1989), Northridge (1995, Kobe (1994) has been used to investigate the behavior of SDOF structure with water sloshing damper. A numerical study was carried out with different important parameters such as mass ratio, and frequency ratio the results showed that there was a reduction in the acceleration response of the structure up to 33% by using different mass ratio. It is also observed that 4% mass ratio is most effective for the acceleration response reduction of the structure.

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Tuned liquid dampers for controlling earthquake response of structures

Cited by 139 publications

References 14 publications

Smoothed particle hydrodynamics (SPH) simulation of a tuned liquid damper (TLD) with angular motion

Smoothed particle hydrodynamics (SPH) simulation of a tuned liquid damper (TLD) with angular motion

Dynamics of vortex evolution in a 2D baffled tank

Seismic Protection of Symmetric Building Equipped with Water Sloshing Damper

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