Abstract
Seismic isolation structure is a superior technology to reduce earthquake damage to buildings. There is a "damping material" as one of the main components of seismic isolation, it is required stable energy absorption performance and several hundred millimeter deformation performance. Damping material commonly used is relatively expensive because of special order of strokes, which is a cause of increasing the costs of the seismic isolation. In order to reduce the cost of the seismic isolation structure, development of a simple damper with long stroke using rubber rings, the authors report the experimental results.
