Integrated passive/active vibration absorber for multi-story buildings

Lee-Glauser, Gina J.; Ahmadi, Goodarz; Horta, Lucas G.

Passive isolator, active vibration absorber, and an integrated passive/active (hybrid) control are studied for their effectiveness in reducing structural vibration under seismic excitations. For the passive isolator, a laminated rubber bearing base isolator which has been studied and used extensively by researchers and seismic designers is considered. An active vibration absorber concept, which can provide guaranteed closed-loop stability with minimum knowledge of the controlled system, is used to reduce the passive isolator displacement and to suppress the top floor vibration. A three-story building model is used for the numerical simulation. The performance of an active vibration absorber and a hybrid vibration controller in reducing peak structural responses is compared with the passively isolated structural response and with absence of vibration control systems under the N00W component of El Centro 1940 and N90W component of the Mexico City earthquake excitation records. The results show that the integrated passive/active vibration control system is most effective in suppressing the peak structural acceleration for the El Centro 1940 earthquake when compared with the passive or active vibration absorber alone. The active vibration absorber, however, is the only system that suppresses the peak acceleration of the structure for the Mexico City 1985 earthquake.

Document ID

19950017788

Acquisition Source

Legacy CDMS

Document Type

Technical Memorandum (TM)

Authors

Date Acquired

September 6, 2013

Publication Date

January 1, 1995

Subject Category

Report/Patent Number

Accession Number

95N24208

Funding Number(s)

Distribution Limits

Public

Work of the US Gov. Public Use Permitted.

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