EFFECT OF DAMPING RATIO ON THE ATTENUATION RELATIONSHIP OF RESPONSE SPECTRUM

Abstract

In this study, attenuation relationships of response spectra with 1%, 2%, 5%, 10% and 20% damping were constructed by using 3990 ground motions recorded by the JMA-87-type accelerometers. Based on the relationships, the amplitude ratios of response spectra with respect to the response spectrum with 5% damping were obtained to reveal the effects of damping ratio and JMA Magnitude on the shape of the amplitude ratio. Then, the verification of predicted response spectrum ratios obtained by attenuation relationships was discussed by using actual earthquake records.