Abstract
A method for estimation of maximum velocity response to ground motions as a function of peak displacement and period of ground motion and some amount of information from seismograms is proposed and applied to some records. In this method, a displacement record is replaced by a harmonic motion and the velocity response is calculated from it. The way to get appropriate numbers of cycles of records is obtained. Studies on the number of cycles about the correlation with the site amplification characteristics and the frequency distribution are carried out. An attenuation relation for velocity response is obtained using a peak displacement attenuation function.
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