Static structures (e.g. – buildings) – Controlled by condition responsive means
Patent
1989-03-06
1990-10-23
Chilcot, Jr., Richard E.
Static structures (e.g., buildings)
Controlled by condition responsive means
52167R, E04B 198
Patent
active
049642464
ABSTRACT:
The present invention contemplates a rigidity control system for a variable rigidity structure incorporating variable rigidity elements, such as braces, for making the connecting condition with the frame variable between the locked and unlocked conditions for example, in which the vibration of a structure caused by external vibrational forces of an earthquake, wind or the like is attenuated by varying the rigidity of the structure. The rigidity control of the present invention imitates the tension and relaxation of a muscle in the self-balancing function of a living body. The vibrational condition of a frame is considered to be separately four conditions, i.e., the process of increasing the deformation in one direction, the process of decreasing the deformaton following thereafter, the process of increasing the deformation in the opposite direction and the process of decreasing the deformation following thereafter. Continuous responses are detected by sensors and the structure is set to be in the rigid condition in the deformation increasing process to restrain the excessive deformation of the building frame while the structure is set to be in the resilient condition in the deformation decreasing process to continuously vary the rigidity of the frame, whereby the resonance of the frame with seismic motion or the like is avoided to attenuate the vibration.
REFERENCES:
patent: 3232012 (1966-02-01), Proctor
patent: 3538653 (1970-11-01), Meckler
patent: 4429496 (1984-02-01), Masri
patent: 4766706 (1988-08-01), Caspe
patent: 4799339 (1989-01-01), Kobori et al.
Kamagata Shuichi
Kanayama Hiroo
Kobori Takuji
Chilcot Jr. Richard E.
Kajima Corporation
Tilberry James H.
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