Premium
Evaluation of Rayleigh damping and its influence on engineering demand parameter estimates
Author(s) -
Erduran Emrah
Publication year - 2012
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.2164
Subject(s) - structural engineering , stiffness , acceleration , modal , engineering , damping ratio , mode (computer interface) , spectral acceleration , moment (physics) , rayleigh scattering , modal analysis , physics , vibration , computer science , finite element method , peak ground acceleration , materials science , classical mechanics , acoustics , optics , polymer chemistry , ground motion , operating system
SUMMARY The effects of Rayleigh damping model on the engineering demand parameters of two steel moment‐resisting frame buildings were evaluated. Two‐dimensional models of the buildings were created and response history analysis were conducted for three different hazard levels. The response history analysis results indicate that mass‐proportional damping leads to high damping forces compared with restoring forces and may lead to overestimation of floor acceleration demands for both buildings. Stiffness‐proportional damping, on the other hand, is observed to suppress the higher‐mode effects in the nine‐story building resulting in lower story drift demands in the upper floors compared with other damping models. Rayleigh damping models, which combine mass‐proportional and stiffness‐proportional components, that are anchored at reduced modal frequencies lead to reasonable damping forces and floor acceleration demands for both buildings and does not suppress higher‐mode effects in the nine‐story building. Copyright © 2012 John Wiley & Sons, Ltd.