A Critical Review of the Rayleigh Damping Model


Abstract eng:
This paper summarizes a study aimed at evaluating damping ratios in buildings inferred from acceleration records obtained in instrumented buildings in California. The data was obtained by examining 119 seismic responses, coming from 24 buildings, collected over the past 25 years by the California Strong Motion Instrumentation Program. All the records were analyzed using a least-squares system identification technique in the time domain. Using only reliable data, the variation of damping with modal frequencies is examined for all buildings. It is found that in 96% of the cases, the modal damping ratios increase approximately linearly with frequency, showing that damping in buildings is best represented by using a stiffness proportional damping. No evidence was found to suggest that a mass-proportional model could be appropriate. The distribution of the linear functions’ parameters are then studied and compared to other published damping recommendations. The results of this investigation are of paramount importance as they could lead to a drastic departure in how damping has been modeled in buildings to date.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 2674.:
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