Compound seismic response and wind control system

Details Compound seismic response and wind control system Compound seismic response and wind control system

1990-01-16

1991-06-25

Murtagh, John E.

Static structures (e.g., buildings)

Means compensating earth-transmitted force

Relative motion means between a structure and its foundation

52167R, 52 1, E04B 198, E04H 902

Patent

active

050255991

ABSTRACT:
A combination active and passive mass damping device to attenuate vibrations in a structure caused by seismic and/or wind forces. A mass is actively rendered vibratable by a hydraulic actuator and passively vibratable by use of springs. The device normally functions as an active mass damper, but, in the event of a power failure, is automatically converted by a failsafe means into a passive mass damping mode.

REFERENCES:
patent: 4799339 (1989-01-01), Kobori et al.
patent: 4807840 (1989-02-01), Baker et al.
Examiner's Amendment `A`.

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