Method of Estimating the Parameters of Tuned Mass Dampers for Seismic Applications.
Method of Estimating the Parameters of Tuned Mass
Dampers for Seismic Applications.
Sadek, F.; Mohraz, B.; Taylor, A. W.; Chung, R. M.
NISTIR 5806; 39 p. April 1996.
Earthquake Engineering and Structural Dynamics, Vol.
26, 617-635, 1997.
Available from: National Technical Information Service
Order number: PB96-167820
building technology; earthquake engineering; passive
control; structural dynamics; tuned mass dampers
The optimum parameters of tuned mass dampers (TMD) that
result in considerable reduction in the response of
structures to seismic loading are presented. The
criterion used to obtain the optimum parameters is to
select, for a given mass ratio, the frequency (tuning)
and damping ratios that would result in equal and larger
modal damping in the first two modes of vibration. The
parameters are used to compute the response of several
single and multi-degree-of-freedom structures with TMDs
to different earthquake excitations. The results
indicate that the use of the proposed parameters reduces
the displacement and acceleration responses
significantly. The method can also be used in vibration
control of tall buildings in the so called
"mega-substructure configuration," where substructures
serve as vibration absorbers for the parent structure.
It is shown that as a result of selecting the parameters
as proposed in this paper, significant reduction in the
response of tall buildings can be achieved.