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Evaluation of damping reduction factors for estimating elastic response of structures with high damping
Author(s) -
Lin YuYuan,
Miranda Eduardo,
Chang KuoChun
Publication year - 2005
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/eqe.499
Subject(s) - damping ratio , reduction (mathematics) , structural engineering , natural frequency , displacement (psychology) , strength reduction , damping torque , spectral acceleration , engineering , vibration , physics , mathematics , ground motion , acoustics , peak ground acceleration , geometry , finite element method , direct torque control , electrical engineering , voltage , induction motor , psychology , psychotherapist
Abstract The damping reduction factors are used in a few building codes in order to estimate the elastic response spectrum with high damping ratios from its 5%‐damped counterpart. At present, much research regarding this factor has been published. The purpose of this paper is to evaluate the accuracy of five different models of damping reduction factors. In addition, the damping reduction factors adopted in the recent U.S.A. seismic codes are also evaluated. Statistical studies are carried out according to a total of 216 earthquake ground motions recorded on firm sites in California. Considered here are elastic single‐degree‐of‐freedom (SDOF) systems with natural vibrating periods between 0.1 and 6.0 s. Mean ratios and dispersion of approximate to exact maximum elastic displacement demands corresponding to various damping reduction factors are computed as functions of the natural vibrating period and the viscous damping ratio. Copyright © 2005 John Wiley & Sons, Ltd.