Geology Reference
In-Depth Information
Chapter 6
Optimal Design and Practical
Considerations of Tuned Mass
Dampers for Structural Control
Chi-Chang Lin
National Chung Hsing University, Taiwan, R.O.C.
Jer-Fu Wang
National Museum of Natural Science, Taiwan, R.O.C.
ABSTRACT
The design concept and procedure for tuned mass dampers (TMDs) have been extensively investigated
through numerical simulation analyses and experimental tests. Sophisticated three-dimensional build-
ing models were developed to examine the optimum installation location in elevation and in plane,
number and movement direction of the TMDs with the consideration of translation-torsion coupling
and soil-structure interaction effects. Analytical and empirical formulas were also derived to determine
the optimal parameters of TMD. It is well recognized that the performance of a TMD is sensitive to the
slight deviation of frequency ratio between the TMD and the structure. Multiple tuned mass dampers
(MTMDs) were proposed to reduce this detuning effect. It is also recognized that TMD's performance
relies on its large stroke which may not be allowed due to the limitation of space and vibration compo-
nents. The authors presented a two-stage optimum design procedure for MTMDs with limitation of their
strokes. New invention patents both in Taiwan and in USA have been granted for the MTMD device.
INTRODUCTION
damper (TMD) is one kind of passive-type devices
and it can be incorporated into an existing structure
with less interference compared with others. Since
1971, TMDs have been successfully installed in
high-rise buildings, observatory towers, long-span
bridge towers and decks, and pedestrian bridges.
Vibration control of structures using supplemental
devices against natural and man-made excitations
has been a topic of interest in civil engineering in
recent decades. Among those devices, tuned mass
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