2017 Volume 17 Issue 4 Pages 4_1-4_12
This paper describes the dynamic characteristics of existing buildings (one is a reinforced concrete structure, and the other is a steel) in Miyagi Pref., Japan. In this paper, the authors used the long-term ambient vibration data and earthquake responses data, which were recorded by a monitoring system with high-performance seismic sensors installed by IRIDeS, Tohoku University, to examine response characteristics of the buildings. As a result of the analysis of the vibration records, it is found that the natural frequency of the RC structure shows stronger correlation with temperature than the S structure. The influence of the temperature dependency is included in the amplitude dependency of the 1st natural frequency. Amplitude dependency become clear by removing temperature dependency.
