Journal of Natural Disaster Science

ATTENUATION AND ESTIMATION OF SITE-DEPENDENT　EARTHQUAKE MOTIONS

Hisao GOTO
Professor
Hiroyuki KAMEDA
Associate Professor
and
Masata SUGITO
Research Associate, Department of Transportation Engineering, Kyoto University, Kyoto

(Received December, 1981, and in revised form 24 December, 1981)

Abstract

This study deals with the use of N-value profiles obtained from standard penetration tests (SPT) in the estimation of site-dependent earthquake motions. Using corrected accelerograms recorded in Japan and the N-value profiles for strong motion stations, attenuation equations for peak acceleration, velocity, and displacement are obtained, in which a site parameter Sn determined for certain weighted integrals of N-value profiles for specific sites is defined so as to represent the effect of site conditions on peak ground motions. It is demonstrated that the proposed site parameters are effective particularly in the estimation of peak acceleration and velocity.

Key words

site-dependent earthquake motion, site parameter, N-value, attenuation equation