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Keywords: tuned liquid damper, tall building, dynamic response, numerical, wind-induced vibration, full scale field measurements.

Summary

Needless to say that the use of tuned liquid dampers (TLDs) in damping wind-induced vibration is indispensable in controlling the effect of fatigue stresses caused by repeated excitation loads. The serviceability of high-rise buildings and steel towers constitutes another important application of TLDs to suppress building acceleration and achieve comfort and healthy conditions. This paper presents a new numerical model developed to investigate the effect of TLDs on the response of structures subjected to external excitations caused by wind. Earlier numerical algorithms postulate equivalent mechanical models for both the structure and the liquid in the TLD. These models are either based on the potential flow theory or the shallow-water theory. The first theory neglects the effect of fluid viscosity; while the later cannot be used to model fluid sloshing motion around obstacles or violent sloshing waves caused by large amplitude excitations. The current numerical model predicts the effect of TLDs on the structure dynamics by solving the full Navier-Stokes equations for the viscous liquid sloshing motion inside the TLD. The current model handles the moving free surface by using the volume of fluid method and uses the continuum surface force model (CSF) to handle the discontinuity accompanied with wave breaking. The present model incorporates the interaction between the structure dynamics and the damping effect of various TLDs located at different floors of the tall building. The model has been validated by direct comparison with full-scale field measurements taken at the National Bank of China building. The comparison shows that the current model can accurately predict the damping effect of TLDs on structure dynamic response.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 102 PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: Paper 39 On the Damping of Wind-Induced Vibration in Tall Buildings T.F. Oda¹, M.S. Hamed¹ and S. Ghani² ¹Thermal Processing Laboratory, Department of Mechanical Engineering McMaster University, Hamilton, Ontario, Canada ²Department of Mechanical and Industrial Engineering, Qatar University, Doha, Qatar doi:10.4203/ccp.102.39 purchase the full-text of this paper Full Bibliographic Reference for this paper T.F. Oda, M.S. Hamed, S. Ghani, "On the Damping of Wind-Induced Vibration in Tall Buildings", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 39, 2013. doi:10.4203/ccp.102.39 Keywords: tuned liquid damper, tall building, dynamic response, numerical, wind-induced vibration, full scale field measurements. Summary Needless to say that the use of tuned liquid dampers (TLDs) in damping wind-induced vibration is indispensable in controlling the effect of fatigue stresses caused by repeated excitation loads. The serviceability of high-rise buildings and steel towers constitutes another important application of TLDs to suppress building acceleration and achieve comfort and healthy conditions. This paper presents a new numerical model developed to investigate the effect of TLDs on the response of structures subjected to external excitations caused by wind. Earlier numerical algorithms postulate equivalent mechanical models for both the structure and the liquid in the TLD. These models are either based on the potential flow theory or the shallow-water theory. The first theory neglects the effect of fluid viscosity; while the later cannot be used to model fluid sloshing motion around obstacles or violent sloshing waves caused by large amplitude excitations. The current numerical model predicts the effect of TLDs on the structure dynamics by solving the full Navier-Stokes equations for the viscous liquid sloshing motion inside the TLD. The current model handles the moving free surface by using the volume of fluid method and uses the continuum surface force model (CSF) to handle the discontinuity accompanied with wave breaking. The present model incorporates the interaction between the structure dynamics and the damping effect of various TLDs located at different floors of the tall building. The model has been validated by direct comparison with full-scale field measurements taken at the National Bank of China building. The comparison shows that the current model can accurately predict the damping effect of TLDs on structure dynamic response. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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