Seismic isolation systems with distinct multiple frequencies

Details Seismic isolation systems with distinct multiple frequencies Seismic isolation systems with distinct multiple frequencies

1989-04-14

1990-07-03

Taylor, Dennis L.

Hydraulic and earth engineering

Foundation

52167R, E04H 902

Patent

active

049386336

ABSTRACT:
A method and apparatus for isolating a building or other structure from smic vibratory motion which provides increased assurance that large horizontal motion of the structure will not occur than is provided by other isolation systems. Increased assurance that large horizontal motion will not occur is achieved by providing for change of the natural frequency of the support and structure system in response to displacement of the structure beyond a predetermined value. The natural frequency of the support and structure system may be achieved by providing for engaging and disengaging of the structure and some supporting members in response to motion of the supported structure.

REFERENCES:
patent: 4474508 (1984-10-01), Vos et al.
patent: 4474729 (1984-10-01), Schoening et al.
patent: 4565039 (1986-01-01), Oguro et al.
patent: 4599834 (1986-07-01), Fujimoto et al.
patent: 4662133 (1987-05-01), Kondo
patent: 4707956 (1987-11-01), Sato
patent: 4830927 (1989-05-01), Fukahori et al.

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