310 コンパクト免震装置の開発

抄録

A compact horizontal seismic isolation device with lowers natural frequency and long stroke is developed in which a roller with two spherical surfaces that have different radius and centers is used to produce the restoring force when the roller swings. This paper introduces the characteristics of isolation device, analyzes the natural frequency and investigates the relationship between roller's parameters. With the analysis and experiment, it is found that the natural frequency of the isolation system with the developed isolation device is not affected by loaded mass.