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. By disposing the key portion 47b on the upper surface or the lower surface of the end portion of the other shoe, the vertical displacement of the other shoe is regulated, and the lower surface of the upper shoe 41 and the upper surface of the lower shoe 43 Stopper rings 41d and 43d, which define the sliding range of the sliding body 45, and concave spherical first sliding surfaces 41c and 43c inside the stopper rings 41d and 43d, respectively, are provided. [Selection diagram] Fig. 3