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US 9,175,490 B2Granted
Seismic isolation apparatus and structure having seismic isolation apparatus
OwnerTakanori Satoinventor
Life of this patent
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Abstract
To provide a seismic isolation apparatus which, as well as widening an applicable shaking range, can be easily configured and is low in height, a seismic isolation apparatus is configured of a low friction combination formed by a point contact between a planar hard base plate, which has a surface on which are disposed at least three convexly curved projections of a uniform height, and a glide plate which is a smooth, hard, flat plate.
Claims22
A seismic isolation apparatus comprising:
- a planar hard base plate having at least three convexly curved projections which project upwardly and have a same height;
- and
- only one glide plate, the glide plate being a smooth, hard, flat plate disposed on the planar hard base plate so as to be movable relative to the planar hard base plate,
- wherein the projections are fixed to the planar hard base plate such that the projections do not rotate, and point contact between the projections and the glide plate provides friction,
- wherein each of the convexly curved projections has a radius of curvature which is 30 mm or more at an apex thereof,
- wherein all of the convexly curved projections of the seismic isolation apparatus project upwardly,
- wherein an entire bottom surface of the glide plate is a plane, and wherein movement of the glide plate relative to the planar hard base plate is initiated by seismic activity.
4 more elements
A seismic isolation structure comprising:
- a lower concrete foundation of a building, the lower concrete foundation having a planar upper surface;
- a seismic isolation apparatus installed on the lower concrete foundation;
- and
- an upper concrete foundation of the building formed on the seismic isolation apparatus, wherein the seismic isolation apparatus comprises:
- i. a planar hard base plate having at least three convexly curved projections which project upwardly and have a same height;
- and
- ii. only one glide plate, the glide plate being a smooth, hard, flat plate disposed on the planar hard base plate so as to be movable relative to the planar hard base plate,
- wherein the projections are fixed to the planar hard base plate such that the projections do not rotate, and point contact between the projections and the glide plate provides friction,
- wherein each of the convexly curved projections has a radius of curvature which is 30 mm or more at an apex thereof,
- wherein all of the convexly curved projections of the seismic isolation apparatus project upwardly,
- wherein an entire bottom surface of the glide plate is a plane, and
- wherein relative movement between the lower concrete foundation and the upper concrete foundation, and movement of the glide plate relative to the planar hard base plate is initiated by seismic activity.
9 more elements
A seismic isolation apparatus comprising:
- a planar hard base plate having at least three convexly curved projections which project upwardly and have a same height;
- and
- only one glide plate, the glide plate being a smooth, hard, flat plate disposed on the planar hard base plate,
- wherein the projections are fixed to the planar hard base plate such that the projections do not rotate, and point contact between the projections and the glide plate provides friction,
- wherein each of the convexly curved projections has a radius of curvature which is 30 mm or more at an apex thereof,
- wherein all of the convexly curved projections of the seismic isolation apparatus project upwardly,
- wherein an entire bottom surface of the planar hard base plate is a plane, and
- wherein relative movement between the planar hard base plate and the glide plate is initiated by seismic activity.
5 more elements
Dependencies are inferred from the claim text.