NIST Time|NIST Home|About NIST|Contact NIST

HomeAll Years:AuthorKeywordTitle2005-2010:AuthorKeywordTitle

Method of Estimating the Parameters of Tuned Mass Dampers for Seismic Applications.


pdf icon Method of Estimating the Parameters of Tuned Mass Dampers for Seismic Applications. (1629 K)
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

Keywords:

building technology; earthquake engineering; passive control; structural dynamics; tuned mass dampers

Abstract:

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.