Tuned liquid dampers (TLDs) are considered economical and effective dynamic vibration absorbers. They are increasingly being used to mitigate the dynamic resonant response of tall buildings and it is often designed to reduce the structure's acceleration at a serviceability limit state. Slat screens can increase the inherent damping factor of TLDs. They have been used as a common flow damping device in TLDs because of the simplicity of using them and also the ability to control their effects on the performance of a TLD. Two slat screens with the same solidity ratio and different patterns could have different effects on the TLD's performance. Many former numerical researches used the potential and linear theory as a base to describe the fluid flow behavior inside the TLD. The applicability of the linearized flow models was for the condition of the low amplitude of excitations. Under large excitation events such as high return period wind storms or earthquakes, the assumptions of linear theory are no longer valid. Moreover, in the linearized model, screens were modeled as a hydraulic resistance point as a function of the screen solidity ratio without the ability to consider the effect of screen pattern. In the present study, a numerical algorithm has been developed which can handle both the small and large amplitude of excitations. In this algorithm, the fluid flow through the screen is fully resolved and it can take into account the effect of the screen pattern on the TLD's performance. The major focus of this paper is to use this developed algorithm and conduct a numerical investigation to study the effects of the slat screen pattern on the inherent damping and natural frequency of the TLD, as the design parameters of the TLD. In this numerical investigation a selected TLD outfitted by different slat screens and interacted with the structure is exposed by both harmonic and random external excitations. The numerical results have been validated against experimental work. The effect of slat screen pattern on the damping effect and natural frequency of a TLD has been presented. Also in this study, two new parameters termed as slat ratio (SR) and effective solidity ratio (Seff) are presented to imply the physical significance of screen pattern.

References

References
1.
Soong
,
T. T.
, and
Dargush
,
G. F.
,
1997
,
Passive Energy Dissipation Systems in Structural Engineering
,
John Wiley
,
New York
, Chap. 8.
2.
Watanabe
,
S.
,
1969
, “
Methods of Vibration Reduction
,”
Proc. Japan Naval Arch. Soc. Symp.
, pp.
156
189
.
3.
Lee
,
S. C.
, and
Reddy
,
D. V.
,
1982
, “
Frequency Tuning of Offshore Platforms by Liquid Sloshing
,”
Appl. Ocean Res.
,
4
, pp.
226
231
.10.1016/S0141-1187(82)80029-1
4.
Fujii
,
K.
,
Tamura
,
Y.
,
Sato
,
T.
, and
Wakahara
,
T.
,
1990
, “
Wind-Induced Vibration of Tower and Practical Applications of Tuned Liquid Damper
,”
J. Wind Eng. Indust. Aerodyn.
,
33
, pp.
263
272
.10.1016/0167-6105(90)90042-B
5.
Wakahara
,
T.
,
1993
, “
Wind-Induced Response of TLD–Structure Coupled System Considering Non-Linearity of Liquid Motion
,”
Shimizu Tech. Res. Bull.
,
12
, pp.
41
52
.
6.
Tait
,
M. J.
,
2004
, “
The Performance of 1-D and 2-D Tuned Liquid Dampers
,” Ph.D. Thesis, University of Western Ontario, London, Canada.
7.
Tait
,
M. J.
,
Isyumov
,
N.
, and
El Damatty
,
A. A.
,
2008
, “
Performance of Tuned Liquid Dampers
,”
J. Eng. Mech.
,
134
(
5
), pp.
417
427
.10.1061/(ASCE)0733-9399(2008)134:5(417)
8.
Tait
,
M. J.
,
2008
, “
Modeling and Preliminary Design of Structure–TLD System
,”
Eng. Struct.
,
30
, pp.
2644
2655
.10.1016/j.engstruct.2008.02.017
9.
Pirner
,
M.
, and
Urushadze
,
S.
,
2007
, “
Liquid Damper for Suppressing Horizontal and Vertical Motions—Parametric Study
,”
J. Wind Eng. Indust. Aerodyn.
,
95
, pp.
1329
1349
.10.1016/j.jweia.2007.02.010
10.
Lee
,
S. K.
,
Park
,
E. C.
,
Min
,
K. W.
,
Lee
,
S. H.
,
Chung
,
L.
, and
Park
,
J. H.
,
2007
, “
Real-Time Hybrid Shaking Table Testing Method for the Performance Evaluation of Tuned Liquid Damper Controlling Seismic Response of Building Structures
,”
J. Sound Vib.
,
302
, pp.
596
612
.10.1016/j.jsv.2006.12.006
11.
Ju
,
Y. K.
,
Yoon
,
S. W.
, and
Kim
,
S. D.
,
2004
, “
Experimental Evaluation of a Tuned Liquid Damper System
,”
Struct. Build.
,
157
, pp.
251
262
.10.1680/stbu.2004.157.4.251
12.
Deng
,
X.
, and
Tait
,
M. J.
,
2009
, “
Theoretical Modeling of TLD With Different Tank Geometries Using Linear Long Wave Theory
,”
ASME J. Vib. Acoust.
,
131
(
4
), p.
041014
.10.1115/1.3142873
13.
Shimizu
,
T.
, and
Hayama
,
S.
,
1987
Nonlinear Response of Sloshing Based on the Shallow Water Wave Theory
,”
JSME Int. J.
,
30
(
263
), pp.
806
813
.10.1299/jsme1987.30.806
14.
Tait
,
M. J.
,
El Damatty
,
A. A.
, and
Isyumov
,
N.
,
2007
, “
Effectiveness of a 2D TLD and Its Numerical Modeling
,”
J. Struct. Eng.
,
33
(
2
), pp.
251
263
.10.1061/(ASCE)0733-9445(2007)133:2(251)
15.
Sun
,
L. M.
, and
Fujino
,
Y.
,
1994
, “
A Semi-Analytical Model for Tuned Liquid Damper With Wave Breaking
,”
J. Fluids Struct.
,
8
, pp.
471
488
.10.1006/jfls.1994.1023
16.
Zang
,
Y.
,
Xue
,
S.
, and
Kurita
,
S.
,
2000
, “
A Boundary Element Method and Spectral Analysis Model for Small-Amplitude Viscous Fluid Sloshing in Couple With Structural Vibrations
,”
Int. J. Numer. Methods Fluids
,
32
, pp.
79
96
.10.1002/(SICI)1097-0363(20000115)32:1<69::AID-FLD929>3.0.CO;2-I
17.
Ramaswamy
,
B.
,
Kawahara
,
M.
, and
Nakayama
,
T.
,
1986
, “
Lagrangian Finite Element Method for the Analysis of Two-Dimensional Sloshing Problems
,”
Int. J. Numer. Methods Fluids
,
6
, pp.
659
670
.10.1002/fld.1650060907
18.
Thé
,
J. L.
,
Raithby
,
G. D.
, and
Stubley
,
G. D.
,
1994
, “
Surface Adaptive Final Volume Method for Solving Free Surface Flows
,”
Numer. Heat Transfer
,
26
(B), pp.
367
380
.10.1080/10407799408914935
19.
Yamamoto
,
K.
, and
Kawahara
,
M.
,
1999
, “
Structural Oscillation Control Using Tuned Liquid Damper
,”
Comput. Struct.
,
71
, pp.
435
446
.10.1016/S0045-7949(98)00240-5
20.
Siddique
,
M. R.
,
Hamed
,
M. S.
, and
El Damatty
,
A. A.
,
2004
, “
A Nonlinear Numerical Model for Sloshing Motion in Tuned Liquid Dampers
,”
Int. J. Numer. Methods Heat Fluid Flow
,
15
(
3
), pp.
306
324
.10.1108/09615530510583900
21.
Ghaemmaghami
,
A.
,
Kianoush
,
R.
, and
Yuan
,
X.
,
2013
, “
Numerical Modeling of Dynamic Behaviour of Annular Tuned Liquid Dampers for Applications in Wind Towers
,”
Comput. Aided Civil Infrastruct. Eng.
,
28
, pp.
38
51
.10.1111/j.1467-8667.2012.00772.x
22.
Ju
,
Y. K.
,
2004
, “
Structural Behaviour of Water Sloshing Damper With Embossments Subject to Random Excitation
,”
Can. J. Eng.
,
31
, pp.
120
132
.10.1139/l03-082
23.
You
,
K. P.
,
Kim
,
Y. M.
,
Yang
,
C. M.
, and
Hong
,
D. P.
,
2007
, “
Increasing Damping Ratios in Tuned Liquid Damper Using Damping Bars
,”
Key Eng. Mater.
,
353-358
(
4
), pp.
2652
2655
.10.4028/www.scientific.net/KEM.353-358.2652
24.
Huang
,
D. Y.
,
Tan
,
P.
,
Yin
,
F.
, and
Zhou
,
F. L.
,
2009
, “
Dynamic Characteristics Analysis of a TLD With an Embedded Transverse Cylinder
,”
J. Vib. Shock
,
28
(
10
), pp.
169
173
.
25.
Warnitchai
,
P.
, and
Pinkaew
,
T.
,
1998
, “
Modeling of Liquid Sloshing in Rectangular Tanks With Flow-Dampening Devices
,”
Eng. Struct.
,
20
(
7
), pp.
593
600
.10.1016/S0141-0296(97)00068-0
26.
Tait
,
M. J.
,
El Damatty
,
A. A.
,
Isyumov
,
N.
, and
Siddique
,
M. R.
,
2005
, “
Numerical Flow Models to Simulate Tuned Liquid Dampers (TLD) With Slat Screens
,”
J. Fluids Struct.
,
20
, pp.
1007
1023
.10.1016/j.jfluidstructs.2005.04.004
27.
Cassolato
,
M. R.
,
Love
,
J. S.
, and
Tait
,
M. J.
,
2011
, “
Modeling of Tuned Liquid Dampers With Inclined Damping Screens
,”
Struct. Control Health Monitor.
,
18
(
6
), pp.
674
681
.10.1002/stc.397
28.
Kaneko
,
S.
, and
Ishikawa
,
M.
,
1999
, “
Modeling of Tuned Liquid Damper With Submerged Nets
,”
ASME J. Pressure Vessel Technol.
,
121
, pp.
334
341
.10.1115/1.2883712
29.
Baines
,
W. D.
, and
Peterson
,
E. G.
,
1951
, “
An Investigation of Flow Through Screens
,”
Trans. ASME
,
73
, pp.
467
480
.
30.
Hamelin
,
J.
,
2007
, “
The Effect of Screen Geometry on the Performance of a Tuned Liquid Damper
,” MSc. Thesis, McMaster University, Hamilton, Canada.
31.
Marivani
,
M.
, and
Hamed
,
M. S.
,
2011
, “
Numerical Modeling of Sloshing Motion in a Tuned Liquid Damper Outfitted With a Submerged Slat Screen
,”
Int. J. Numer. Methods Fluids
,
65
(
7
), pp.
834
855
.10.1002/fld.2216
32.
Marivani
,
M.
, and
Hamed
,
M. S.
,
2009
, “
Numerical Simulation of Structure Response Outfitted With a Tuned Liquid Damper
,”
J. Comput. Struct.
,
87
(
17
), pp.
1154
1165
.10.1016/j.compstruc.2009.05.010
33.
Hirt
,
C. W.
, and
Nichols
,
B. D.
,
1981
, “
Volume of Fluid (VOF) Method for the Dynamics of Free Boundaries
,”
J. Comput. Phys.
,
39
, pp.
201
225
.10.1016/0021-9991(81)90145-5
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