Magnitude and distance dependent design spectra for rock sites based on Iranian acceleration time-histories and comparison with regional design spectra

Summary Ground vibrations during an earthquake can severely damage structures and equipments housed in them. Many factors including earthquake magnitude, distance from the fault or epicenter, duration of strong shaking, soil condition of the site, and the frequency content of the motion define the properties of ground motion and its amplification. A deep understanding of the effects of these factors on the response of structures and equipments *