SHAKING TABLE TEST AND ANALYTICAL STUDY ON LOW FRICTION SLIDING BEARINGS FOR FLOOR DECK ISOLATION SYSTEM

Properties for low-friction bearings, which have been developed for the floor isolation system of a long-span truss bridge, have not revealed. Therefore shaking table tests and analytical studies considering amplified vertical acceleration by main structure as well as horizontal acceleration have been carried out. The results show that the friction coefficient under the high speed is smaller than that under the low speed, and the effect of vertical input can be neglected under the design grond motion. In addition, a simplified design model is here proposed. It is rigid-plastic model appling the equivalent coefficient concept considering the velocity-friction coefficient curve below the design maximum velocity.