The effect of damping on floor spectral accelerations as inferred from instrumented buildings

This study investigates the effect of damping on the seismic demands imposed on lightweight nonstructural components. The investigation was performed utilizing a total of 113 floor acceleration recordings obtained from instrumented buildings located in California. Results are presented as damping mo...

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Published in:Bulletin of earthquake engineering 2020-03, Vol.18 (5), p.2149-2164
Main Authors: Kazantzi, A. K., Vamvatsikos, D., Miranda, E.
Format: Article
Language:English
Subjects:
Acceleration
Aseismic buildings
Buildings
Civil Engineering
Components
Dam influences
Damping
Earth and Environmental Science
Earth Sciences
Earthquake dampers
Environmental Engineering/Biotechnology
Floors
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Hydrogeology
Original Research
Probability distribution
Probability theory
Statistical analysis
Structural Geology
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creator Kazantzi, A. K.
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description This study investigates the effect of damping on the seismic demands imposed on lightweight nonstructural components. The investigation was performed utilizing a total of 113 floor acceleration recordings obtained from instrumented buildings located in California. Results are presented as damping modification factors, which provide information on the seismic demands imposed on secondary systems with various levels of damping relative to 5% damped components. Evaluations of the results indicate a strong period dependence, with the effect of damping being much larger for components that are tuned or nearly tuned and much smaller for components with periods far from the modal periods of the supporting building. Therefore, a better characterization of the effect of damping is achieved if the damping modification factors are a function of the ratio of the period of the component to the modal periods of the supporting structure. As expected, record-to-record variability increases as the level of damping in the secondary component deviates from 5% damping, with an overall probability distribution that is approximately lognormal. Thus, a full probabilistic characterization of the influence of damping on component response is offered via a parametric, period- and damping-dependent model of the mean and lognormal standard deviation of the damping modification factor.
doi_str_mv 10.1007/s10518-019-00781-3
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subjects Acceleration
Aseismic buildings
Buildings
Civil Engineering
Components
Dam influences
Damping
Earth and Environmental Science
Earth Sciences
Earthquake dampers
Environmental Engineering/Biotechnology
Floors
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Hydrogeology
Original Research
Probability distribution
Probability theory
Statistical analysis
Structural Geology
title The effect of damping on floor spectral accelerations as inferred from instrumented buildings
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