Abstract
Research on seismic isolation technology was also a question of how much restoring force can be reduced. Seismic isolation rubber with thin film like rubber and metal plates stacked in multiple stages to reduce the restoring force has achieved great success. However, research to date has shown that rocking movement has become a major obstacle when trying to construct a three-dimensional seismic isolation using it. This research is an effort to further minimize the restoring force, to eliminate obstacles to three-dimensionalization and make the three-dimensional seismic isolation more realistic. Vibration test of a prototype of a newly developed three-dimensional seismic isolation mechanism were carried out using a real scale 3 dimensional seismic wave by E - defense excitation device. The developed 3-D seismic isolation mechanism consists of an air levitation mechanism that isolates horizontal vibration and a spring link mechanism that isolates vertical vibration. The prototype showed unprecedented high performance of about 20 dB of anti-vibration capability at 1 Hz for both horizontal and vertical, and the effectiveness of this mechanism was verified.
