Sliding seismic isolation device and bridge

摘要

PROBLEM TO BE SOLVED: To provide a slip seismic isolation device capable of suppressing both relative horizontal displacement and vertical displacement between an upper and lower stiles at the time of an earthquake, and a bridge equipped with this slip seismic isolation device in a movable bearing. To provide. SOLUTION: This is a slip seismic isolation device 40 having an upper shoe 41, a lower shoe 43, and a sliding body 45, and a pair of moving direction regulating jigs 47 straddling the upper shoe 41 and the lower shoe 43 is one of them. It is fixed to the shoe, not fixed to the other shoe, the horizontal displacement of the other shoe in a predetermined direction is regulated by the moving direction regulating jig 47, and the moving direction regulating jig 47 is the key portion 47b. The key portion 47b is arranged on the upper surface or the lower surface of the end portion of the other shoe to regulate the vertical displacement of the other shoe, and the sliding body 45 is on the lower surface or the upper surface of the other shoe. A stopper ring 41d that defines the sliding range of the shoe ring 41d, and a concave spherical first sliding surface 41c that is circular in a plan view are provided inside the stopper ring 41d. [Selection diagram] Fig. 3