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A METHOD OF ESTIMATING THE PARAMETERS OF TUNED MASS DAMPERS FOR SEISMIC APPLICATIONS
Author(s) -
SADEK FAHIM,
MOHRAZ BIJAN,
TAYLOR ANDREW W.,
CHUNG RILEY M.
Publication year - 1997
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/(sici)1096-9845(199706)26:6<617::aid-eqe664>3.0.co;2-z
Subject(s) - tuned mass damper , substructure , structural engineering , reduction (mathematics) , modal , vibration , displacement (psychology) , acceleration , damper , vibration control , damping ratio , engineering , spectral acceleration , peak ground acceleration , mathematics , physics , materials science , acoustics , ground motion , geometry , psychology , classical mechanics , polymer chemistry , psychotherapist
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 large 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 using the so‐called ‘mega‐substructure configuration’, where substructures serve as vibration absorbers for the main structure. It is shown that by selecting the optimum TMD parameters as proposed in this paper, significant reduction in the response of tall buildings can be achieved. © 1997 John Wiley & Sons, Ltd.