Prepared for 4 th EQTAP Workshop in Kamakura, Inventory Development for Natural and Built Environments: Use of Seismic Motion and Microtremor for Vulnerability Assessment

Abstract This study aims to establish and spread the damage assessment system for both ground and structures. In Mexico City, repeatedly attacked by big earthquakes, microtremor measurement was conducted at many points of ground and buildings, in collaboration with CIRES, Centro de Instrumentación y Registro Sísmico. While having grasped the present earthquake response characteristic of the ground and structures using measured data, the ability of assessment methods for earthquake resistance was examined. Consequently, the following results were obtained: (1) It was conformed that the earthquake response characteristics of the ground and structures can be exactly grasped by microtremor. And also, measured microtremor data is useful as basic data to predict future earthquake damages of the measured object. (2) The evaluating methods of vulnerability indices for ground and structures based on investigated data were proposed. Moreover, the validity of this method was verified by comparing with actual earthquake damages. Our research aim at the next stage is to improve the accuracy of the proposed method and to spread its use in many economies