SEISMIC ISOLATION SYSTEM AND SEISMIC ISOLATION STRUCTURE

摘要

[PROBLEMS] To provide a seismic isolation system having restoration characteristics which reduces acceleration by prolonging the natural period of upper structure regardless of a load to be supported, and exhibits excellent vibration energy absorption capability by obtaining a suitable friction force properly. [MEANS FOR SOLVING PROBLEMS] The seismic isolation system (1) comprises an upper shoe (11) secured to the upper structure (3) of a building and having a concave lower surface (11a) opening downward, and a lower shoe (12) secured to the lower structure (2) such as the foundation and having a concave upper surface (12a) opening upward,and a moving body (13) arranged movably between the upper shoe (11) and the lower shoe (12). The moving body (13) has a convex upper surface (13a) facing the concave lower surface (11a) of the upper shoe (11), and a convex lower surface (13b) facing the concave upper surface (12a) of the lower shoe (12), wherein a plurality of air outlets (13c) are provided in the convex upper surface (13a) and the convex lower surface (13b). At least three seismic isolation systems (1) are arranged in a seismic isolation structure.