Stiffness decoupler for base isolation of structures

Details Stiffness decoupler for base isolation of structures Stiffness decoupler for base isolation of structures

1992-10-07

1995-02-07

Friedman, Carl D.

Static structures (e.g., buildings)

Means compensating earth-transmitted force

Cross bracing

52295, 52301, 52724, E04H 902

Patent

active

053866711

ABSTRACT:
A stiffness decoupling assembly (22) is provided for the protection of buildings or other structures (20) subject to earthquakes, in order to prevent collapse or catastrophic failure of such structures (20). The preferred decoupling assembly (22) includes a plurality of elongated, relatively flexible, concrete-filled pipes (28) rigidly connected to the structure (20) and extending downwardly toward an underlying foundation (26), with at least certain of the pipes (28) being coupled to the foundation (26) for resisting overturning of the structure (20). A primary load-bearing column (46) rests upon the foundation (26) and receives the array of pipes (28); bearing means (32) is interposed between the upper end of the column (46) and structure (20) for permitting relatively lateral movement therebetween. The invention serves to decouple the lateral stiffness from the load-carrying strength of the column (46), to thereby reduce the transmissibility of ground acceleration to the protected structure (20).

REFERENCES:
patent: 862681 (1907-08-01), Tresidder
patent: 1190002 (1916-07-01), Picuri
patent: 1602828 (1926-10-01), Lally
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patent: 3110982 (1963-11-01), Besinger
patent: 3418768 (1968-12-01), Cardan
patent: 3606704 (1971-09-01), Denton
patent: 4766708 (1988-08-01), Sing

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