Abstract
In this paper, a base isolation system with restorative mechanism using sliding bearing is developed, and the dynamic characteristics of this system were evaluated by excitation experiments. Increasing the thickness of sliding bearing edge that makes contact with surface of the lower plate, the damping ratio and the coefficient of static friction became large. However, the natural frequency is independent of the thickness of sliding bearing edge. In the case that the thickness of sliding bearing edge is 0.5mm and the damping ratio is 0.8, the peak acceleration amplitude of response waveform decreases into about 20% compared to input wave using artificial seismic wave. On the other hand, it decreases into about 70% compared to input wave using observed seismic wave. To decrease the friction force, it needs to change the material of slide bearing.
