Author(s)

A. Che, T. Iwatate & Y. Oda

Abstract

In order to investigate the local site effects for seismic vulnerability of a study area based on its ground motion characteristics of the surface ground, microtremor measurements were conducted on the ground of typical sites in Asia (Zushi, and Ogasawara- Japan, Xi’an-China, Manila-Philippines, and Gujarat- India) with different soil conditions. From these observation data, the fundamental frequencies and the dynamic characteristics of the surface ground were estimated by spectral ratio H/V of Nakamura’s method [1]. These results showed good agreement with those obtained from earthquake observations. Moreover, the seismic responses of the ground were evaluated using the earthquake records. This study will be useful for the seismological micro zoning and planning seismic disaster mitigation

Keywords