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US 5,177,915 AGranted
Elasto-plastic damper
AssigneeKajima Corporation
InventorsTakuju Kobori, Shunichi Yamada, Shigeru Ban, Koji Ishii, Isao Nishimura, Masatoshi Ishida, Kuniaki Sato, Yasuo Takenaka, Shozo Maeda, Jun Tagami
Life of this patent
Estimating the term…
Abstract
An elasto-plastic damper adapted to be used in a structure for absorbing vibration energy created by earthquake tremors and other ground vibrations. The damper is formed from flat plates to simplify design and to minimize costs. The damper may be used in combination to absorb vibration energy impacting the structure from different directions.
Claims34
A one-piece elasto-plastic damper for a structure, comprising:
- a vertically aligned single plate body having a top end and a bottom end;
- vertical parallel front and back surfaces of like dimensions and non-parallel edge surfaces therebetween and normal thereto;
- a base plate secured to said bottom end of said body;
- and
- said front and back surfaces uniformaly varying in width such that a section modulus at a horizontal cross section of said body increases progressively from said top end of said body toward said bottom edn.
2 more elements
A steel one piece elasto-plastic damper adapted to protect building structures by attenuating seismic tremors comprising:
- a load-bearing non-compressible damper body having a top and a base;
- said damper body being formed from a flat plate having a pair of parallel sides in vertical alignment and a pair of at least partially non-parallel sides adapted to support and to space apart a first structure member from a second structure member;
- said top being adapted to be secured to said first structure member;
- said base being adapted to be secured to said second structure member;
- and said damper body being deformable responsive to seismic tremors of a magnitude sufficient to stress said damper within its elastic limit and being plastically deformable responsive to seismic tremors of a magnitude sufficient to stress said damper beyond its elastic limit.
2 more elements
An elasto-plastic damper for a structure, comprising:
- a plate-like body;
- and
- a pair of base plates disposed one on each of opposite ends of said body,
- said body having a varying width increasing progressively from said midportion toward said base plates such that a section modulus at a horizontal cross section of said body increases progressively from a midportion of said body toward said base plates.
1 more element
A one-piece elasto-plastic damper adapted to protect building structures by attenuating seismic tremors, comprising:
- a load-bearing non-compressible damper body having a top and a base,
- said damper body being formed from a flat plate having a pair of parallel sides restricted at their midsection;
- and
- a pair of at least partially non-parallel sides adapted to support and to space apart a first structure member from a second structure member;
- said top being adapted to be secured to said first structure member;
- said base being adapted to be secured to said second structure member;
- and
- said damper body being deformable responsive to seismic tremors of a magnitude sufficient to stress said damper within its elastic limit and being plastically deformable responsive to seismic tremors of a magnitude sufficient to stress said damper beyond its elastic limit.
5 more elements
A one-piece elasto-plastic damper adapted to protect building structures by attenuating seismic tremors, comprising:
- a load-bearing non-compressible damper body having a top and a base,
- said damper body being formed from a flat plate having a pair of at least partially non-parallel sides adapted to support and to space apart a first structure member from a second structure member;
- said top being adapted to be secured to said first structure member;
- said base being adapted to be secured to said second structure member;
- and
- said damper body being deformable responsive to seismic tremors of a magnitude sufficient to stress said damper within its elastic limit and being plastically deformable responsive to seismic tremors of a magnitude sufficient to stress said damper beyond its elastic limit.
3 more elements
A one-piece elasto-plastic damper adapted to protect building structures by attenuating seismic tremors, comprising:
- a load-bearing non-compressible damper body having a top and a base,
- said damper body being formed from a flat plate having a pair of at least partially non-parallel sides adapted to support and to space apart a first structure member from a second structure member;
- said top being adapted to be secured to said first structure member;
- said base being adapted to be secured to said second structure member;
- and
- said damper body being deformable responsive to seismic tremors of a magnitude sufficient to stress said damper within its elastic limit and being plastically deformable responsive to seismic tremors of a magnitude sufficient to stress said demper beyond its elastic limit.
3 more elements
A one-piece elasto-plastic damper adapted to protect building structures by attenuating seismic tremors, comprising:
- a load-bearing non-compressible damper body having a top and a base,
- said damper body being formed from a flat plate wherein two opposite sides of said damper body are paralle, a third side joins and is normal to said two opposite sides, and a fourth side joins said two opposite sides remote from said third side and tapers inwardly from said base toward said midsection;
- said top being adapted to be secured to said first structure member;
- said base being adapted to be secured to said second structure member;
- and
- said damper body being deformable responsive to seismic tremors of a magnitude sufficient to stress said damper within its elastic limit and being plastically deformable responsive to seismic tremors of a magnitude sufficient to stress said damper beyond its elastic limit.
3 more elements
A one-piece elasto-plastic damper adapted to protect building structures by attenuating seismic tremors, comprising:
- a load-bearing non-compressible damper body having a top and a base,
- said damper body being formed from a flat plate having a first two opposite sides which are parallel and a second two opposite sides which taper inwardly from both said base and from said top toward said midsection and are adatped to support and to space apart a first structure member from a second structure member;
- said top being adapted to be secured to said first structure member;
- said base being adapted to be secured to said second structure member;
- and
- said damper body being deformable responsive to seismic tremors of a magnitude sufficient to stress said damper within its elastic limit and being plastically deformable responsive to seismic tremors of a magnitude sufficient to stress said damper beyond its elastic limit.
3 more elements
A one-piece elasto-plastic damper adapted to protect building structures by attenuating seismic tremors, comprising:
- a load-bearing non-compressible damper body having a top and a base,
- said damper body being formed from a flat plate wherien two opposite sides of said damper body are parallel, a third side joins and is normal to said two opposite sides, and a fourth side joins and is normal to said two opposite sides remote from said third side and tapers outwardly from said top to said base and wherein the top of said damper body comprises a laterally projecting rectangular member;
- said damper body being adapted to support and to space apart a first structure member from a second structure member;
- said top being adapted to be secured to said first structure member;
- said base being adapted to be secured to said second structure member;
- and
- said damper body being deformable responsive to seismic tremors of a magnitude sufficient to stress said damper within its elastic limit and being plastically deformable responsive to seismic tremors of a magnitude sufficient to stress said damper beyond its elastic limit.
4 more elements
Dependencies are inferred from the claim text.