Estimation of peak relative velocity and peak absolute acceleration of linear SDOF systems

In the seismic analysis and design of structures, the true velocity and absolute acceleration are usually approximated by their corresponding pseudo-values. This approach is simple and works well for structures with small damping （say, less than 15%）. When the damping of a structure is enhanced for...

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Bibliographic Details
Published in:Earthquake Engineering and Engineering Vibration 2007-03, Vol.6 (1), p.1-10
Main Authors: Song, Jianwei, Chu, Yi-Lun, Liang, Zach, Lee, George C.
Format: Article
Language:English
Subjects:
Acceleration
Damping
Design engineering
Ground motion
Reduction
Seismic engineering
Seismic phenomena
Seismic response
Spectra
Velocity
Vibration
峰值相对速度
峰值绝对加速度
线性SDOF系统
阻尼装置
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Summary:In the seismic analysis and design of structures, the true velocity and absolute acceleration are usually approximated by their corresponding pseudo-values. This approach is simple and works well for structures with small damping （say, less than 15%）. When the damping of a structure is enhanced for the purpose of response reduction, it may result in large analysis and design errors. Based on theory of random vibration and the established mechanism of seismic response spectra analysis, a method is developed （1） to predict the relative velocity spectra with any damping ratio level directly from the 5% standard pseudo-acceleration spectrum; and （2） to estimate the peak absolute acceleration. The accuracy of both is validated by using two selected ensembles of ground motion records.
ISSN:1671-3664
1993-503X
DOI:10.1007/s11803-007-0702-x