Seismic isolation apparatus for structures, method for installing apparatus thereof, and seismic isolation member

Abstract

The seismic isolation apparatus 1 is an apparatus for damping the vibrations of an upper section A of a structure with respect to a lower section B of the structure, and provided with a plurality of U-shaped seismic isolation members 10, a first coupling plate 20 to which one end of the seismic isolation member 10 is fixed, and a second coupling plate 30 to which the other end of the seismic isolation member 10 is fixed. The seismic isolation members 10 A are placed between the first coupling plate 20 and the second coupling plate 30 in a direction. The seismic isolation members 10 B are placed between the first coupling plate 20 and the second coupling plate 30 in a direction oppose to the direction of the seismic isolation members 10 A.

1 . A seismic isolation apparatus for damping vibrations of an upper section of a structure with respect to a lower section of the structure, the seismic isolation apparatus comprising:
 a plurality of U-shaped seismic isolation members;   a first coupling plate to which one end of the seismic isolation member is fixed; and   a second coupling plate to which the other end of the seismic isolation member is fixed, wherein   some of the plurality of the seismic isolation members are placed between the first coupling plate and the second coupling plate in a predetermined direction, and the other of the plurality of the seismic isolation members are placed between the first coupling plate and the second coupling plate in a direction opposed to the predetermined direction.   
     
     
         2 . The seismic isolation apparatus according to  claim 1 , wherein
 both ends of the seismic isolation member are fixed with bolts respectively to the first coupling plate and the second coupling plate.   
     
     
         3 . The seismic isolation apparatus according to  claim 2 , wherein
 one bolt is disposed at a portion of fixing one end of the seismic isolation member to the first coupling plate, and the other bolt is disposed at a portion of fixing the other end of the seismic isolation member to the second coupling plate.   
     
     
         4 . The seismic isolation apparatus according to  claim 2 , wherein
 a plurality of the bolts are disposed at a portion of fixing one end of the seismic isolation member to the first coupling plate, and the other bolts are disposed at a portion of fixing the other end of the seismic isolation member to the second coupling plate.   
     
     
         5 . The seismic isolation apparatus according to  claim 1 , wherein
 both ends of the seismic isolation member are welded respectively to the first coupling plate and the second coupling plate.   
     
     
         6 . The seismic isolation apparatus according to  claim 1 , wherein
 recesses into which one end or the other end of the seismic isolation member is fitted are formed respectively on the first coupling plate and the second coupling plate, and   both ends of the seismic isolation member are fitted respectively into the recesses and thereafter fixed to the first coupling plate and the second coupling plate.   
     
     
         7 . The seismic isolation apparatus according to  claim 1 , further comprising an isolator having metal plates and plate-shaped elastic bodies alternately stacked, wherein
 the isolator is placed between the upper section and the lower section.   
     
     
         8 . A method for installing a seismic isolation apparatus on a lower section and an upper section of a structure, the seismic isolation apparatus having a first coupling plate to be fixed to the lower section, a second coupling plate to be fixed to the upper section opposing the lower section, and a plurality of seismic isolation members fixed respectively to the first coupling plate and the second coupling plate so as to be placed between the first coupling plate and the second coupling plate toward a predetermined direction and a direction opposing the predetermined direction, the method for installing the seismic isolation apparatus comprising the steps of:
 disposing the seismic isolation apparatus on the lower section so that the seismic isolation members are set along a previously assumed direction of vibrations of the upper section to the lower section;   fixing the seismic isolation apparatus to the lower section;   disposing the upper section on the seismic isolation apparatus; and   fixing the seismic isolation apparatus to the upper section.   
     
     
         9 . A seismic isolation member placed between an upper section and a lower section, thereby damping the vibrations of the upper section to the lower section which are generated in a previously assumed direction by its own plastic deformation, wherein
 the seismic isolation member being formed in a U shape and placed between the upper section and the lower section along the previously assumed direction of vibrations, one end of the seismic isolation member is fixed to the lower section and the other end of the seismic isolation member is fixed to the upper section.