Earthquakes and Structures

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Recovery of spectral absolute acceleration and spectral relative velocity from their pseudo-spectral counterparts

  • Papagiannopoulos, George A. (Department of Civil Engineering, University of Patras) ;
  • Hatzigeorgiou, George D. (Department of Environmental Engineering, Democritus University of Thrace) ;
  • Beskos, Dimitri E. (Department of Civil Engineering, University of Patras)
  • Received : 2012.01.17
  • Accepted : 2012.11.21
  • Published : 2013.05.25
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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.

Keywords

References

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