000019005 001__ 19005 000019005 005__ 20170118182254.0 000019005 04107 $$aeng 000019005 046__ $$k2017-01-09 000019005 100__ $$aMiranda, Eduardo 000019005 24500 $$aA Critical Review of the Rayleigh Damping Model 000019005 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering 000019005 260__ $$b 000019005 506__ $$arestricted 000019005 520__ $$2eng$$aThis 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. 000019005 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb. 000019005 653__ $$adamping, system identification, higher modes, Rayleigh damping 000019005 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16 000019005 720__ $$aMiranda, Eduardo$$iCruz, Cristian 000019005 8560_ $$ffischerc@itam.cas.cz 000019005 8564_ $$s361476$$uhttps://invenio.itam.cas.cz/record/19005/files/2674.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2674. 000019005 962__ $$r16048 000019005 980__ $$aPAPER