DETERMINATION OF K-T PARAMETERS USING BUTTERWORTH FILTER

Abstract

The spectral content and duration of some major Indian earthquake time-histories or strong-motion accelerogramshave been studied with an aim of quantifying the uncertainty of ground motion. Ground motions are characterized by Kanai-Tajimiparameters based on spectral density function which has been computed using Butterworth filter. Parameters are estimated for each record based on the method of spectral moments. The statistics and dependencies of the parameters are evaluated, and in particular, correlations between the Kanai-Tajimi parameters, maximum ground acceleration, epicentral distance, and magnitude of earthquake are investigated. The estimated parameters by using correlation can be used for purposes during seismic consideration of design.