Static structures (e.g. – buildings) – Means compensating earth-transmitted force – Relative motion means between a structure and its foundation
Patent
1989-04-25
1991-06-11
Chilcot, Jr., Richard E.
Static structures (e.g., buildings)
Means compensating earth-transmitted force
Relative motion means between a structure and its foundation
E04H 902
Patent
active
050222015
ABSTRACT:
A positive vibration suppression apparatus is disclosed, which suppresses vibrations of a building caused by earthquakes or winds by applying a control force to the building. The apparatus comprises a weight provided on the top of the building in a suspended form to reduce friction and an actuator provided between the weight and the building. The vibration suppression apparatus is controlled through sensing of the vibrations of the building and weight by a sensor, whereas for excessive vibrations of the building the vibrations of the weight are made close to the vibrations of the building to protect the apparatus, because the capacity of the vibration suppression apparatus is limited. Further, in an oil hydraulic system for obtaining a great control force, small and large size oil hydraulic pumps connected to respective small and large size electric motors and an accumulator are provided in parallel, so that the apparatus is warmed up at all time for oil hydraulic control with low power consumption. Two or more vibration suppression apparatuses are controlled at the same time according to the shape of the building to cope with torsional and secondary vibration components.
REFERENCES:
patent: 3940895 (1976-03-01), Yamamoto et al.
patent: 4793105 (1988-12-01), Caspe
patent: 4799339 (1989-01-01), Kobori et al.
patent: 4841685 (1989-06-01), Masri et al.
J. N. Yang, "Optimal Control Theory to Civil Engineering Structures," Journal of the engineering Mechanics Division, vol. 101, No. EM6, Dec. 1975, pp. 819-838.
James C. H. Chang and Tsu T. Soong, "Structural Control Using Active Tuned Mass Dampers," Journal of the Engineering Mechanics Division, vol. 106, No. EM6, Dec., 1980, pp. 1091-1098.
J. N. Yang, "Control of Tall Buildings under Earthquake Excitation," Journal of the Engineering Mechanics Division, vol. 108, No. EM5, Oct., 1982, pp. 833-849.
Ishii Koji
Kobori Takuji
Nishimura Isao
Sakamoto Mitsuo
Tagami Jun
Chilcot Jr. Richard E.
Kajima Corporation
Tilberry James H.
Van Patten Michele A.
LandOfFree
Apparatus for accelerating response time of active mass damper e does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for accelerating response time of active mass damper e, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for accelerating response time of active mass damper e will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-774458