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Earthquakes and Structures Volume 4, Number 5, May 2013 , pages 489-508 DOI: https://doi.org/10.12989/eas.2013.4.5.489 |
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Recovery of spectral absolute acceleration and spectral relative velocity from their pseudo-spectral counterparts |
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George A. Papagiannopoulos, George D. Hatzigeorgiou and Dimitri E. Beskos
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| Abstract | ||
| Design spectra for damping ratios higher than 5% have several important applications in the design of earthquake-resistant structures. These highly damped spectra are usually derived from a 5%-damped reference pseudo-acceleration spectrum by using a damping modification factor. In cases of high damping, the absolute acceleration and the relative velocity spectra instead of the pseudo-acceleration and the pseudo-velocity spectra should be used. This paper elaborates on the recovery of spectral absolute acceleration and spectral relative velocity from their pseudo- spectral counterparts. This is accomplished with the aid of correction factors obtained through extensive parametric studies, which come out to be functions of period and damping ratio. | ||
| Key Words | ||
| absolute acceleration; relative velocity; pseudo-spectral values; damping modification factor;correction factors; seismic motions | ||
| Address | ||
| George A. Papagiannopoulos: Department of Civil Engineering, University of Patras, GR-26500 Patras, Greece; George D. Hatzigeorgiou: Department of Environmental Engineering, Democritus University of Thrace, GR-67100 Xanthi, Greece; Dimitri E. Beskos: Department of Civil Engineering, University of Patras, GR-26500 Patras, Greece; Office of Theoretical and Applied Mechanics, Academy of Athens, 4 Soranou Efessiou str.,GR-11527 Athens, Greece GR-11527 Athens, Greece | ||