US2017044788A1PendingUtilityA1

Seismic isolation device and manufacturing method of the same

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Assignee: MIYAZAKI MITSUOPriority: Jun 13, 2014Filed: Sep 21, 2016Published: Feb 16, 2017
Est. expiryJun 13, 2034(~7.9 yrs left)· nominal 20-yr term from priority
Inventors:Mitsuo Miyazaki
C23C 4/08E04B 1/98B22D 19/16E04H 9/022
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Claims

Abstract

A composite metal core 30 incorporated in a laminated rubber bearing for damper having two different kinds of metal material. An outer metal 31 includes a material having a high rigidity and an excellent plastic deformability. An inner metal 32 includes a material having low rigidity and an excellent plastic deformability. By making a rising rate of a bending rigidity of the composite metal core higher than a rising rate of a shear rigidity of the composite core, the composite metal core enters a deformation mode in which a superior shear deformability is created. In that deformation mode, the performance of absorbing energy generated in a process of plastic deformation is stabilized. And at the same time, an average horizontal shear yield stress degree of the composite metal core can be set at an arbitral level between the horizontal shear yield stress degrees of the two kinds of metal.

Claims

exact text as granted — not AI-modified
1 - 15 . (canceled) 
     
     
         16 . A seismic isolation device comprising:
 a laminated rubber bearing body formed by alternately laminating a plurality of elastic materials and a plurality of rigid materials in a vertical direction, each elastic material and each rigid material having a plate shape; and   a metal core disposed inside the laminated rubber bearing body in a vertical direction and plastically deformable to absorb energy,   wherein the metal core has an approximately quadrate shape, or an approximately polygonal shape having fewer angles than octagon in the horizontal cross-sectional view.   
     
     
         17 . The seismic isolation device according to  claim 16 , further comprising the laminated rubber bearing body and a composite metal core disposed inside the laminated rubber bearing body in a vertical direction and plastically deformable to absorb energy,
 wherein the composite metal core includes an inner metal and an outer metal, the outer metal concentrically surrounding the inner metal in a horizontal cross-sectional view, the inner metal and the outer metal being disposed in close adherence with each other, the outer metal having an elastic modulus and a yield rigidity greater than the inner metal so that a shear deformability of the composite metal core becomes greater than a bending deformability of the composite metal core, and   wherein a horizontal shear resistance force QC of the composite metal core in a predetermined cross-sectional area is set to satisfy an equation: QB≦QC<QA, the QA being a horizontal shear resistance force in the predetermined cross-sectional area of a metal core A comprising the single outer metal, and the QB being a horizontal shear resistance force in the predetermined cross-sectional area of a metal core B comprising the single inner metal.   
     
     
         18 . The seismic isolation device according to  claim 16 , wherein the inner metal comprises lead or lead alloy and the outer metal comprises any one of tin, tin alloy, aluminum, aluminum alloy, zinc, zinc alloy, copper and copper alloy. 
     
     
         19 . The seismic isolation device according to  claim 17 , wherein the inner metal comprises lead or lead alloy and the outer metal comprises any one of tin, tin alloy, aluminum, aluminum alloy, zinc, zinc alloy, copper and copper alloy. 
     
     
         20 . The seismic isolation device according to  claim 18 , wherein a thickness t 1  of the outer metal in the cross-sectional plane view is set to satisfy an equation t 1 /dp≦0.35, the dp being a size of the composite metal core in the horizontal cross-sectional view. 
     
     
         21 . The seismic isolation device according to  claim 19 , wherein a thickness t 1  of the outer metal in the cross-sectional plane view is set to satisfy an equation t 1 /dp≦0.35, the dp being a size of the composite metal core in the horizontal cross-sectional view. 
     
     
         22 . The seismic isolation device according to  claim 16 , wherein the inner metal comprises tin or tin alloy and the outer metal comprises any one of aluminum, aluminum alloy, zinc, zinc alloy, copper and copper alloy. 
     
     
         23 . The seismic isolation device according to  claim 17 , wherein the inner metal comprises tin or tin alloy and the outer metal comprises any one of aluminum, aluminum alloy, zinc, zinc alloy, copper and copper alloy. 
     
     
         24 . The seismic isolation device according to  claim 22 , wherein a thickness t 1  of the outer metal in the cross-sectional plane view is set to satisfy an equation t 1 /dp≦0.35, the dp being a size of the composite metal core in the horizontal cross-sectional view. 
     
     
         25 . The seismic isolation device according to  claim 23 , wherein a thickness t 1  of the outer metal in the cross-sectional plane view is set to satisfy an equation t 1 /dp≦0.35, the dp being a size of the composite metal core in the horizontal cross-sectional view. 
     
     
         26 . The seismic isolation device according to  claim 16 , wherein the inner metal comprises aluminum or aluminum alloy and the outer metal comprises any one of zinc, zinc alloy, copper and copper alloy. 
     
     
         27 . The seismic isolation device according to  claim 17 , wherein the inner metal comprises aluminum or aluminum alloy and the outer metal comprises any one of zinc, zinc alloy, copper and copper alloy. 
     
     
         28 . The seismic isolation device according to  claim 26 , wherein a thickness t 1  of the outer metal in the cross-sectional plane view is set to satisfy an equation t 1 /dp≦0.35, the dp being a size of the composite metal core in the horizontal cross-sectional view. 
     
     
         29 . The seismic isolation device according to  claim 27 , wherein a thickness t 1  of the outer metal in the cross-sectional plane view is set to satisfy an equation t 1 /dp≦0.35, the dp being a size of the composite metal core in the horizontal cross-sectional view. 
     
     
         30 . The seismic isolation device according to  claim 16 , wherein the inner metal comprises zinc or zinc alloy and the outer metal comprises copper or copper alloy. 
     
     
         31 . The seismic isolation device according to  claim 17 , wherein the inner metal comprises zinc or zinc alloy and the outer metal comprises copper or copper alloy. 
     
     
         32 . The seismic isolation device according to  claim 30 , wherein a thickness t 1  of the outer metal in the cross-sectional plane view is set to satisfy an equation t 1 /dp≦0.35, the dp being a size of the composite metal core in the horizontal cross-sectional view. 
     
     
         33 . The seismic isolation device according to  claim 32 , wherein a thickness t 1  of the outer metal in the cross-sectional plane view is set to satisfy an equation t 1 /dp≦0.35, the dp being a size of the composite metal core in the horizontal cross-sectional view. 
     
     
         34 . The seismic isolation devise according to  claim 16 , wherein one or two lid member, which is screw-cut, for fixing a core is incorporated at a plane center part of an upper end and/or a lower end of the composite metal core, and
 wherein the lid member comprise copper or copper alloy.

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