Tuned Liquid Damper (TLD) for Suppressing Horizontal Motion of Structures

Fujino, Yozo; Sun, Lijun; Pacheco, Benito M.; Chaiseri, Piyawat

doi:10.1061/(asce)0733-9399(1992)118:10(2017)

Cited by 209 publications

(107 citation statements)

References 18 publications

(19 reference statements)

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“…The motion and viscosity of the liquid generate the required damping. This tuned liquid damper (TLD) is cost-effective, easy to install and maintain and requires a very low vibration level to which it will respond, which is sometimes a problem with standard mechanical TMDs [204]. Nakamura and Fujino [156] reported that 600 plastic tanks with 34 mm of water were employed to suppress lateral vibrations of a cable-stayed footbridge.…”

Section: Other Damping Devicesmentioning

confidence: 99%

Vibration serviceability of footbridges under human-induced excitation: a literature review

Živanović

Pavić

Reynolds

2005

Journal of Sound and Vibration

515

315

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Increasing strength of new structural materials and longer spans of new footbridges, accompanied with aesthetic requirements for greater slenderness, are resulting in more lively footbridge structures. In the past few years this issue attracted great public attention. The excessive lateral sway motion caused by crowd walking across the infamous Millennium Bridge in London is the prime example of the vibration serviceability problem of footbridges. In principle, consideration of footbridge vibration serviceability requires a characterisation of the vibration source, path and receiver. This paper is the most comprehensive review published to date of about 200 references which deal with these three key issues.The literature survey identified humans as the most important source of vibration for footbridges. However, modelling of the crowd-induced dynamic force is not clearly defined yet, despite some serious attempts to tackle this issue in the last few years.The vibration path is the mass, damping and stiffness of the footbridge. Of these, damping is the most uncertain but extremely important parameter as the resonant behaviour tends to govern vibration serviceability of footbridges.A typical receiver of footbridge vibrations is a pedestrian who is quite often the source of vibrations as well. Many scales for rating the human perception of vibrations have been found in the published literature. However, few are applicable to footbridges because a receiver is not stationary but is actually moving across the vibrating structure.During footbridge vibration, especially under crowd load, it seems that some form of humanstructure interaction occurs. The problem of influence of walking people on footbridge vibration properties, such as the natural frequency and damping is not well understood, let alone quantified.Finally, there is not a single national or international design guidance which covers all aspects of the problem comprehensively and some form of their combination with other published information is prudent when designing major footbridge structures. The overdue update of the current codes to reflect the recent research achievements is a great challenge for the next 5-10 years. Abbreviations:ASD-auto spectral density; DLF-dynamic load factor; DOF-degree of freedom; FE-finite element;FRF-frequency response function; MDOF-multiple-degree-of-freedom;MTMD-multiple tuned mass damper; RMS-root-mean-square;SDOF-single-degree-of-freedom; TLD-tuned liquid damper; TMD-tuned mass damperThis paper has been published under the following reference:Živanović, S., Vibration serviceability of footbridges under human-induced excitation: a literature review.

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Section: Other Damping Devicesmentioning

confidence: 99%

Vibration serviceability of footbridges under human-induced excitation: a literature review

Živanović

Pavić

Reynolds

2005

Journal of Sound and Vibration

515

315

View full text Add to dashboard Cite

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“…Tuned liquid dampers (TLDs) gained increased popularity due to their effectiveness in absorbing low-frequency vibrations induced by wind, being cost effective, requiring less maintenance, and being easily implementable [11]. TLDs are energy dissipation devices, suggested for vibration suppression under different dynamic loads.…”

Section: Tuned Liquid Dampersmentioning

confidence: 99%

“…This allows significant energy dissipation and hence reduced structural responses [12]. The fundamental principle of vibration control in structures using TLDs is based on sloshing and wave breaking for energy dissipation [11]. For efficient energy dissipation, the fundamental frequency of liquid in a TLD should be close to that of the primary structure.…”

Section: Tuned Liquid Dampersmentioning

confidence: 99%

Structural Improvements for Tall Buildings under Wind Loads: Comparative Study

Longarini

Cabras

Zucca

et al. 2017

Shock and Vibration

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The behavior of a very slender building is investigated under wind loads, to satisfy both strength and serviceability (comfort) design criteria. To evaluate the wind effects, wind tunnel testing and structural analysis were conducted, by two different procedures: (i) Pressure Integration Method (PIM), with finite element modeling, and (ii) High Frequency Force Balance (HFFB) technique. The results from both approaches are compared with those obtained from Eurocode 1 and the Italian design codes, emphasizing the need to further deepen the understanding of problems related to wind actions on such type of structure with high geometrical slenderness. In order to reduce wind induced effects, structural and damping solutions are proposed and discussed in a comparative study. These solutions include (1) height reduction, (2) steel belts, (3) tuned mass damper, (4) viscous dampers, and (5) orientation change. Each solution is studied in detail, along with its advantages and limitations, and the reductions in the design loads and structural displacements and acceleration are quantified. The study shows the potential of damping enhancement in the building to mitigate vibrations and reduce design loads and hence provide an optimal balance among resilience, serviceability, and sustainability requirements.

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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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Tuned Liquid Damper (TLD) for Suppressing Horizontal Motion of Structures

Cited by 209 publications

References 18 publications

Vibration serviceability of footbridges under human-induced excitation: a literature review

Vibration serviceability of footbridges under human-induced excitation: a literature review

Structural Improvements for Tall Buildings under Wind Loads: Comparative Study

Dynamics of vortex evolution in a 2D baffled tank

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