Device and method for protecting a building against earthquake t

Details Device and method for protecting a building against earthquake t Device and method for protecting a building against earthquake t

1987-09-10

1990-01-02

Raduazo, Henry E.

Static structures (e.g., buildings)

Means compensating earth-transmitted force

Relative motion means between a structure and its foundation

403100, 403102, 403 32, E02D 2734

Patent

active

048904309

ABSTRACT:
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.

REFERENCES:
patent: 849638 (1907-04-01), Platt
patent: 2352565 (1944-06-01), Ranson
patent: 2965399 (1960-12-01), Rizzuto
patent: 3184261 (1965-05-01), Young
patent: 3796017 (1974-03-01), Meckler
patent: 4389141 (1983-06-01), Cummings
patent: 4429496 (1984-02-01), Masri
patent: 4587777 (1986-05-01), Vasques

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