Theoretical and experimental studies on rectangular liquid dampers under arbitrary excitations

Koh, C. G., Mahatma, S. and Wang, C. M. (1994) Theoretical and experimental studies on rectangular liquid dampers under arbitrary excitations. Journal of Earthquake Engineering and Structural Dynamics, 23 1: 17-31. doi:10.1002/eqe.4290230103

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Author Koh, C. G.
Mahatma, S.
Wang, C. M.
Title Theoretical and experimental studies on rectangular liquid dampers under arbitrary excitations
Journal name Journal of Earthquake Engineering and Structural Dynamics   Check publisher's open access policy
ISSN 0098-8847
Publication date 1994-01-01
Sub-type Article (original research)
DOI 10.1002/eqe.4290230103
Open Access Status Not Open Access
Volume 23
Issue 1
Start page 17
End page 31
Total pages 15
Place of publication Chichester, West Sussex, United Kingdom
Publisher John Wiley & Sons
Language eng
Abstract This paper presents a study on the behaviour of rectangular liquid dampers under a horizontal excitation of arbitrary time history. The theoretical model to predict motion of a shallow liquid in a rectangular tank is adapted from a previous researchers' model which was developed for sinusoidal excitations. The model includes an energy dissipation term arising from liquid viscosity. In the present consideration of arbitrary excitations, the energy dissipation term is derived in a straightforward way, without resorting to the equivalent linearization method or assumption of harmonic response as used by earlier researchers. The up‐crossing rate of wave height is used in furnishing the Reynolds number required for the evaluation of shear stress in the boundary layer. Since there was no known precedent study involving arbitrary excitations, experiments have been performed accordingly to verify the model. Generally, the theoretical model furnishes results which are found to be in close agreement with the experimental ones. The results also illustrate the strong dependency of liquid motion upon the natural frequency of the damper, amplitude and frequency content of the excitation spectrum. The model is then applied to study the effectiveness of tuned liquid dampers in vibration control of a single‐degree‐of‐freedom structure subjected to earthquake excitations. Significant suppression of structural vibration can be achieved using tuned liquid dampers.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
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Citation counts: TR Web of Science Citation Count  Cited 35 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 11 Jan 2017, 22:08:31 EST by Clare Nelson on behalf of School of Mechanical and Mining Engineering