Pendulum seismic isolation bearings. Design, analysis, experiment
In the present research a pendular type of seismoisolation system for protection construction from earthquake is considered. Seismic isolation is carried out on the basis of the following principles:
• the natural frequency of the "protected object - seismic isolation" should be significantly
lower than the main energy contained frequency (which leads to high frequencies filtering);
• damping in seismic isolation systems should be high enough to avoid resonance effects;
• in seismic isolation systems can be applied elements that limit the level of force that is passed to the protected object (a plastically deformable or friction elements).
A design of devices (component of seismoisolation systems) is shown in the article. The methods of seismoisolation systems analysis are described and the results are presented. The main results of dynamic tests of those devices are shown.