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Avtorstvo: Peter FAJFAR // 1.01 Izvirni znanstveni članek
Leto: 2000
Citat: CHAI, Y. H., FAJFAR, Peter. A procedure for estimating input energy spectra for seismic design. Journal of earthquake engineering - JEE, 2000, vol. 4, no. 4, str. 539-561, ilustr.
Povzetek: In this paper, the damage potential of an earthquake ground motion is evaluated in terms of the total power of the acceleration of the ground motion. By assuming an appropriate spectral shape for the input energy spectrum, and using the well-known Parseval theorem for evaluating the total power of a random signal, the peak amplification factor for the equivalent input energy velocity spectrum can be determined. It is shown that the peak amplification factor for the input energy spectrum depends on the peak-ground-acceleration to peak-ground-velocity ratio and duration of the strong motion phase of the ground motion. Values for the equivalent input energy velocity amplification factor vary from about 2 to 10 for most of the recorded ground motions used in this study. Although a considerable scatter of data is observed in this study, the peak amplification factor predicted by the Fourier amplitude spectrum of the ground acceleration provides a fairly good estimate of the mean value of the peak input energy compared to that determined from inelastic dynamic time history analyses, particularly for systems with high damping and low lateral strength. The peak amplification factor derived in this paper provides a more consistent approach for estmation of seismic demand when compared to an earlier empirical expression used for the formulation of duration-dependent inelastic seismic design spectra, even though only a slight difference in the required lateral strenght results from the use of the new formula [COBISS.SI-ID 1125473]
Tipologija: 1.01 Izvirni znanstveni članek
COBISS ID 1125473 Polni zapis iz sistema COBISS
Vpisal 2009/06/10 11:56