Static structures (e.g. – buildings) – Means compensating earth-transmitted force – Relative motion means between a structure and its foundation
Patent
1985-10-31
1987-01-06
Friedman, Carl D.
Static structures (e.g., buildings)
Means compensating earth-transmitted force
Relative motion means between a structure and its foundation
52573, E02D 2734
Patent
active
046336281
ABSTRACT:
The device of the invention comprises a set of flat rings which can slide laterally on each other with a central rubber core and/or peripheral rubber cores. In this base isolator device the interfacial friction force acts in parallel with the elastic force in the rubber. It combines the beneficial effect of friction damping with that of the resiliency of rubber. The rubber cores distribute the sliding displacement along the height of the device and, due to rubber's resiliency, limit the maximum residual displacement at the base to a pre-specified value, thereby eliminating the need for any repositioning operation after earthquakes. Also, the resiliency of the rubber cores aid in reducing the high frequency effects attributed to friction isolators.
REFERENCES:
patent: 3921240 (1975-11-01), Fyfe
patent: 4033005 (1977-07-01), Czernik et al.
patent: 4121393 (1978-10-01), Renault et al.
patent: 4238137 (1980-12-01), Furchak et al.
patent: 4499694 (1985-02-01), Buckle et al.
patent: 4554767 (1985-11-01), Ikonomou
Cornaby K. S.
Friedman Carl D.
Smith Creighton
University of Utah
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