To prevent a base isolating device from being bent as much as possible by interposing a cushioning material for absorbing and moderating the bending deformation of a structure between the structure and the face plate of the base isolating device to connect the both.
A recessed part 2a is provided upward on the upper face plate 2 of a base isolating device 1 horizontally set on the pedestal 6a of a foundation 6, and a protruding part 5a to be fitted to the recessed part 2a is protruded downward in the connecting position of the foundation beam 5 of a base isolating structure with the base isolating device 1. A highly ductile buffering material 4 such as lead is filled in the recessed part 2a, the recessed part 2a is fitted to the protruding part 5a to ensure a horizontal clearance 7a and a vertical clearance 7b between the both, and a ring seal 8 for sealing the buffering material 4 is installed to the circumferential surface of the protruding part 5a. Thus, the volume of the buffering material 4 is kept constant, and the foundation beam 5 is never settled even by a large loading weight from the foundation beam 5. Since the lead material has a low yield point, however, it is plasticized by the bending moment of the foundation beam 5 to absorb and moderate the bending deformation of the foundation beam 5, so that no excessive bending is imparted to the base isolating device 1.
| JP2000038855 | BASE ISOLATED BUILDING |
| JP7059489 | building |
MURAI NOBUYOSHI
TANAKA TOSHIYUKI
KUSAKABE KAZUICHI
YAMANE KAZUMI
YAMAMOTO MASAFUMI
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