Shaking Table Model Experimental Research On The Composite Isolation Including Elastic Sliding Bearings

This article uses rubber isolation bearings and elastic sliding bearings to form a new kind of structure—composite isolation system including elastic sliding bearings. It not only gathers the merits of the two isolation bearings, but also avoids the demerits of its components. This isolation system can make a better isolation effect in reasonable seismic isolation layer parameters. Furthermore, it has some merits such as isolating slight earthquake and preventing rubber bearing's oversize displacement.A two-floor still-frame model of composite isolation structure including elastic sliding bearings was tested to simulate the earthquake on shaking table in this paper. Acceleration response and displacement response under three kinds of earthquake waves were determinated in this test and acceleration spectrum was analyzed by data processing software. Seismic isolation layer parameters including friction bearing radio was adjusted by changing the number of elastic sliding bearings. This paper studies on friction bearing radio, seismic wave and seismic intensity influencing to the isolation property, and seeks reasonable friction bearing radio for better isolation effect. The test result shows that friction bearing radio, seismic wave and seismic intensity have a great influence on isolation property and this isolation system is an isolation system of good performance in a moderate number of elastic sliding bearings and reasonable friction bearing radio.Besides, this paper made a time-history analysis of a six–layer frame composite isolation system masonry building including elastic sliding bearings by finite-element software SAP2000. The contrast of the time-history analysis results of different isolation programs proves that this isolation system can have a good isolation effect.