Static structures (e.g. – buildings) – Means compensating earth-transmitted force – Relative motion means between a structure and its foundation
Patent
1988-05-06
1990-05-08
Raduazo, Henry E.
Static structures (e.g., buildings)
Means compensating earth-transmitted force
Relative motion means between a structure and its foundation
52 1, 52741, E02D 2734
Patent
active
049226711
ABSTRACT:
The present invention is related to a method for restraining response of a structure to outside disturbances such as winds and earthquakes etc. and an apparatus therefor.
According to the invention there is provided an apparatus which comprises (a) an enclosure defining an inner space thereby, (b) a liquid retained in the enclosure and having a free surface, and (c) an obstacle means disposed in the enclosure for disturbing a flow of the liquid, whereby the liquid has at least one sloshing natural frequency and the obstacle means increases damping coefficient of the sloshing.
According to the invention, there is also provided a method which comprises the steps of (a) attaching at least one enclosure to the structure, the enclosure defining an inner space, (b) attaching at least one obstacle means to the enclosure so that the obstacle is retained inside the enclosure, and (c) providing the enclosure with liquid so that a prescribed portion of the inner space filled with the liquid and the liquid has a free surface, wherein dimensions of the enclosure and the amount of the liquid is so determined that a sloshing natural frequency of the liquid generally coincides with the natural frequency of the structure.
REFERENCES:
patent: 4226554 (1980-10-01), Vandiver
patent: 4264233 (1981-04-01), McCambridge
patent: 4712944 (1987-12-01), Rose
patent: 4783937 (1988-11-01), Sato
Raduazo Henry E.
Shimizu Construction Co. Ltd.
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