Study on Two-Dimensions Base-Isolating Device for Reduction of Displacement by Using Friction Force Available to Purchase

This paper deals with research of new isolation device with reduction of horizontal relative displacement by using friction force and reduction of vertical response acceleration and relative displacement by using spring and friction force. The isolation device is using a friction surface. The friction surface is subjected to acts on the slope plate. The restoring-force of horizontal direction is given to the isolation device from elastic force of a compression spring attached to the base. The restoring-force always works in the direction of the center. Therefore, the frictional force and the restoring-force are both proportional to the displacement. The restoring-force of the vertical direction is given to the isolation device from compression springs and draft springs. Simulation analysis was performed under various conditions using this analysis model. Condition reducing both response acceleration and displacement effectively is calculated on various conditions using the analysis model. Furthermore, an experiment is conducted using the experimental device. The experiment is conducted by an imagination wave. Analysis is also conducted on the same conditions. The results of the experiment are compared with the results of the analysis. The performance of the isolation device is examined. The validity of an analysis model is examined. As a result of conducting the analysis and an experiment with this model, it was shown that response acceleration and relative displacement can be reduced successfully. The validity of an analysis model is shown. Next, it analyzes by actual seismic waves. The performance of isolation equipment in actual seismic waves is examined and shown.