Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12306
Title: Multiple tuned liquid column dampers for reducing coupled lateral and torsional vibration of structures
Authors: Shum, KM
Xu, YL 
Keywords: Buffeting analysis
Coupled lateral and torsional vibration
Harmonic excitation
Multiple tuned liquid column dampers
Parametric study
White noise excitation
Issue Date: 2004
Publisher: Pergamon Press
Source: Engineering structures, 2004, v. 26, no. 6, p. 745-758 How to cite?
Journal: Engineering structures 
Abstract: This paper presents a theoretical investigation on the performance of multiple tuned liquid column dampers (MTLCD) for mitigating the coupled lateral and torsional vibration of a long span bridge which can be modelled as a two degrees-of-freedom structure. The cross section of the bridge has a vertical axis of symmetry but with the vertical offset between the elastic centre and the mass centre of the bridge. The external dynamic force and moment are applied at the elastic centre of the bridge. The proposed MTLCD consists of two sets of liquid column dampers with one tuned to the lateral frequency of the bridge and the other tuned to the torsional frequency of the bridge. The equations of motion for the coupled lateral and torsional vibration of the bridge with MTLCD are first presented. The nonlinear damping property of MTLCD is linearized using the equivalent linearisation technique. Extensive parametric studies are then carried out in the frequency domain to find beneficial parameters of the MTLCD for achieving maximum reduction of coupled lateral and torsional vibration of the bridge. The parameters investigated herein include water mass distribution between the two dampers, distance from the centre line of the MTLCD to the rotational axis of the bridge, ratio of horizontal length to total length of liquid column, head loss coefficient, and frequency tuning ratio. The performance of the MTLCD in reducing buffeting response of the bridge due to turbulent wind is finally investigated. This study shows that the performance of MTLCD in reducing the lateral and torsional displacements of the bridge depends on the head-loss coefficient and the frequency-tuning ratio significantly. It is also demonstrated that the aeroelastic effects due to the interaction between turbulent wind and bridge motion is a crucial factor affecting the performance of MTLCD in reducing buffeting responses of the bridge.
URI: http://hdl.handle.net/10397/12306
ISSN: 0141-0296
EISSN: 1873-7323
DOI: 10.1016/j.engstruct.2004.01.006
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

11
Last Week
0
Last month
1
Citations as of Sep 9, 2017

WEB OF SCIENCETM
Citations

10
Last Week
0
Last month
1
Citations as of Sep 23, 2017

Page view(s)

41
Last Week
2
Last month
Checked on Sep 17, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.