Integrated horizontal and vertical seismic isolation bearing
First Claim
1. A seismic isolation bearing device for imposition between a base and a superstructure comprising;
- a shear key effective to damp horizontally imposed seismic loads fixedly secured to said base,a vertical isolation cylinder containing a hollow interior fixed with respect to said superstructure,an upper fixing plate connected to said shear key, said upper fixing plate being contained in the interior of said vertical isolation cylinder and being vertically movable with respect thereto;
guide means for guiding the movement of said upper fixing plate with respect to said vertical isolation cylinder comprising said upper fixing plate cooperating with an interior wall of said vertical isolation cylinder to define a space therebetween, and a plurality of balls disposed in said space between said upper fixing plate and said cylinder wall to facilitate guided relative vertical movement between said upper fixing plate and vertical isolation cylinder, anda compression spring for damping vertically imposed seismic loads disposed between said upper fixing plate and said superstructure.
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Accused Products
Abstract
A seismic isolation bearing device is disclosed in which a laminated elastic rubber-steel bearing adapted to isolate horizontal seismic loading cooperates with a vertical isolation device employing a compression spring, or equivalent device, effective for isolating vertical seismic loadings whereby a three dimensional seismic isolation device is effective to isolate both vertical and horizontal seismic loadings to insure the structural integrity of a superstructure against damage induced by seismic events. The isolation device formed of an isolation cylinder fixed to the structure, with an upper fixing plate vertically movable within the cylinder. A plurality of steel balls being disposed within a space formed between the perimeter of the upper fixing plate and the interior wall of the isolation cylinder. The balls facilitating the guided relative vertical movement between the upper fixing plate and the isolation cylinder. A compression spring within the cylinder and between the upper fixing plate and the structure serves to dampen the vertically imposed seismic loads.
13 Citations
1 Claim
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1. A seismic isolation bearing device for imposition between a base and a superstructure comprising;
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a shear key effective to damp horizontally imposed seismic loads fixedly secured to said base, a vertical isolation cylinder containing a hollow interior fixed with respect to said superstructure, an upper fixing plate connected to said shear key, said upper fixing plate being contained in the interior of said vertical isolation cylinder and being vertically movable with respect thereto; guide means for guiding the movement of said upper fixing plate with respect to said vertical isolation cylinder comprising said upper fixing plate cooperating with an interior wall of said vertical isolation cylinder to define a space therebetween, and a plurality of balls disposed in said space between said upper fixing plate and said cylinder wall to facilitate guided relative vertical movement between said upper fixing plate and vertical isolation cylinder, and a compression spring for damping vertically imposed seismic loads disposed between said upper fixing plate and said superstructure.
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Specification
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- Resources
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Current AssigneeKorea Hydro and Nuclear Power Company Limited (Government of South Korea)
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Original AssigneeKorea Electric Power Corporation (Government of South Korea), Korea Atomic Energy Research Institute (Government of The Republic of Korea)
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InventorsLee, Jae-Han, Yoo, Bong, Koo, Gyeong-Hoi, Cho, Mann
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Primary Examiner(s)Safavi, Michael
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Application NumberUS08/739,969Time in Patent Office867 DaysField of Search52/167.4, 52/167.7, 52/167.8, 248/565, 248/636, 248/638US Class Current52/167.8CPC Class CodesE04H 9/022 and comprising laminated st...
