초록 ▼

A rigidity control device is provided to change the natural resonance of an entire building by varying the rigidity of selected structural members such as pillars, beams, braces or floor and pillar, wall and pillar or beam connection members, joints, and the like. The rigidity of a structural member

A rigidity control device is provided to change the natural resonance of an entire building by varying the rigidity of selected structural members such as pillars, beams, braces or floor and pillar, wall and pillar or beam connection members, joints, and the like. The rigidity of a structural member is controlled by restraining or releasing a member from restraint or by applying a controlled force to the member. These processes are selectively combined so that the rigidity of the whole building and each section thereof is controlled by a computer according to earthquake forecast analysis. Thus, the proper rigidity of a building is determined and provided responsive to earthquake detection to prevent the building from destructive resonance caused by earthquake tremors.

대표청구항 ▼

In combination with structural members of a building subject to stresses caused by seismic tremors, seismic detector means; mechanical rigidity control devices adapted to relieve said stresses, secured between first and second structural members; actuating means adapted to activate said devices; and

In combination with structural members of a building subject to stresses caused by seismic tremors, seismic detector means; mechanical rigidity control devices adapted to relieve said stresses, secured between first and second structural members; actuating means adapted to activate said devices; and control means adapted to activate said actuating means responsive to seismic tremors when said seismic tremors reach a predetermined level of intensity; a preselected number of said first and second building members being equipped with said devices; said actuating means being further adapted to selectively actuate said devices to vary the rigidity of selected portions of said building; said actuating means including computer means, in communication with said seismic detector means, adapted to selectively actuate said rigidity control devices, responsive to communication between said computer and said seismic detector means, each of said rigidity control devices comprising a beam, said actuating means being adapted to deflect said beam to vary the rigidity of said selected portions of said building, whereby the natural vibration period of said building is varied as required by said beam deflection to protect it from destructive earthquake-induced vibration.