Title:
CONTROL STRUCTURE FOR LONG FREQUENCY
Document Type and Number:
Japanese Patent JP3508388
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce the transmission of the acceleration and the horizontal displacement to the upper layer in an earthquake, by forming the horizontal rigidity of the lower layer as a soft structure and installing a vibration-control device and giving a control force proportional to the product of the rigidity of the lower layer and the displacement at the earthquake to the structure by the vibration-control device.
SOLUTION: An actuator 2 is installed at the head of a brace of the first layer of a structure 1. In this case, the horizontal deformation brought in the first layer at an earthquake and the control force proportional to the rigidity act in the increasing direction of the deformation, in the actuator 2. Accordingly, the horizontal rigidity of the first layer is decreased as much as the deformation and the control force. The vibrational period becomes longer than the proper period of the structure 1 and the earthquake acceleration input to the upper layer is reduced. Since the rigidity of the layer on which an control force acts is made to form a soft structure, the vibration-control device necessary for energy is limited to only one layer. In this way, the supply of energy and keeping of the installation space can be easily executed.
Inventors:
Niwa, Naomiki
Kurata, Shigeto
Kurata, Shigeto
Application Number:
JP12720096A
Publication Date:
March 22, 2004
Filing Date:
May 22, 1996
Export Citation:
Assignee:
KAJIMA CORP
International Classes:
E04H9/02; (IPC1-7): E04H9/02
Attorney, Agent or Firm:
久門 知 （外１名）
Previous Patent: CONTROLLER FOR POWER ASSISTED BICYCLE
Next Patent: METHOD FOR COMPLETING CASTING IN CONTINUOUS CASTING
Next Patent: METHOD FOR COMPLETING CASTING IN CONTINUOUS CASTING