A STUDY ON EARTHQUAKE OBSERVATION RECORD IN THE BUILDING USING THE THREE-DIMENSIONAL SEISMIC ISOLATION SYSTEM

Abstract

The seismic isolation system building becomes general to improve the seismic safety in Japan, recently. However, the general seismic isolation system is chiefly effective only to the horizontal motion not for the vertical motion. In the future, it is necessary that we achieve developing the device against the vertical motion for securing the improvement of the seismic safety and the habitability. And so we have been developed the three-dimensional seismic isolation system for applying to a general building. It consists of laminated rubber bearings as horizontal isolation device and air springs as vertical isolation device. The rocking suppression device with oil dampers can control a rocking vibration. The building using the three-dimensional seismic isolation system was completed on March 3, 2011. In this paper, we report the observation record, system identification and simulation analysis of earthquake observation records. And by analyzing earthquake observation records, we confirm the seismic characteristics and efficacy of the three-dimensional seismic isolation system.