Vibration control apparatus and method, and high-rise building

Abstract

A vibration control apparatus is installed in a high-rise building. The vibration control apparatus 10 comprises an added mass member 20 having a predetermined mass, a column 22 for placing the added mass member 20 separated from the high-rise building, a vibration damping member 24 in contact with the column 22 and installation member 26. The natural frequency of the vibration control apparatus 10 is adapted to be substantially equal to the natural frequency of the high-rise building. At the time of earthquake, the vibration control apparatus and the high-rise building produce resonance, and the vibration energy of the column 22 is absorbed in the vibration damping member 24.

1 . A vibration control apparatus, comprising: 
 a column, wherein one end thereof is installed to a target building and other end thereof is a free end, said free end having a mass; and    a damping member for damping the cantilever vibration of said column.    
   
   
       2 . A vibration control apparatus for a high-rise building, comprising: 
 an added mass member having a predetermined mass;    a column for placing said added mass member separated from said high-rise building; and    a vibration damping member in contact with said column;    wherein natural frequency of said vibration control apparatus is adapted to be substantially equal to natural frequency of said high-rise building.    
   
   
       3 . The vibration control apparatus according to  claim 2 , wherein natural frequency of said vibration control apparatus is configured to be variable at the time of installation or after installation in accordance with vibration nature of said high-rise building.  
   
   
       4 . The vibration control apparatus according to  claim 3 , wherein natural frequency of said vibration control apparatus is configured to be variable by enabling installation position of said added mass member to move upward or downward on said column.  
   
   
       5 . The vibration control apparatus according to  claim 4 , wherein installation position of said added mass member can be adjustable in step.  
   
   
       6 . The vibration control apparatus according to  claim 3 , wherein natural frequency of said vibration control apparatus is configured to be variable by making bending stiffness of said column variable.  
   
   
       7 . The vibration control apparatus according to  claim 3 , wherein natural frequency of said vibration control apparatus is configured to be variable by making mass of said added mass member variable.  
   
   
       8 . The vibration control apparatus according to  claim 2 , wherein said added mass member and said column are molded in one piece.  
   
   
       9 . The vibration control apparatus according to  claim 2 , wherein damping ratio of said vibration damping member is variable.  
   
   
       10 . The vibration control apparatus according to  claim 9 , further comprising a member for absorbing the temperature change of the damping ratio of said vibration damping member.  
   
   
       11 . The vibration control apparatus according to  claim 2 , wherein said column has plural point mass for exerting the vibration reduction effect corresponding to plural vibration mode of said high-rise building.  
   
   
       12 . The vibration control apparatus according to  claim 11 , wherein said column is configured to be attached with two or more added mass member.  
   
   
       13 . The vibration control apparatus according to  claim 2 , wherein said high-rise building is a power pole.  
   
   
       14 . The vibration control apparatus according to  claim 2 , wherein mass of said added mass member is a one-several hundredth order of the weight of said high-rise building.  
   
   
       15 . A high-rise building having a vibration control apparatus at any part of the building, said vibration control apparatus comprising: 
 an added mass member having predetermined mass;    a column for placing said added mass member separated from said high-rise building; and    a vibration damping member in contact with said column;    wherein natural frequency of said vibration control apparatus is adapted to be substantially equal to natural frequency of said high-rise building.    
   
   
       16 . A vibration control method for existing high-rise building, comprising: 
 installing a longitudinal member having natural frequency substantially equal to that of said high-rise building, one end of said member being fixed to said high-rise building and other end of said member being free; and    installing damping member for damping the vibration of said longitudinal member.