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Hybrid Tuned Mass Damper and Isolation Floor Slab System Optimized for Vibration Control
Base isolation and tuned mass dampers are known to be highly effective for earthquake mitigation. However, their effectiveness is limited to a specific domain of cases and is confined by various constraints that have to be met. In this study, a hybrid floor slab tuned mass damper and isolation system is introduced whereby the floor slabs are allowed to move relative to the main frame. The floor slabs are resting on curved supports to allow for self-centering of the slabs upon the conclusion of the seismic event. An optimized design of the curved supports and friction between the supports and the slabs can reduce the response of the structure by up to 40%. The optimization strategy is employed over a range of frequencies in order to minimize the response for any input. The results show an improved system behavior with decreased displacement, acceleration, and inter-story drift. The proposed system is shown to not only be quite effective, but also much more robust than conventional isolation strategies. The floor slab mass is uncoupled from that of the main frame through isolation while emulating the function of a tuned mass damper system with inherently much higher mass ratio; hence the improved response.
Hybrid Tuned Mass Damper and Isolation Floor Slab System Optimized for Vibration Control
Base isolation and tuned mass dampers are known to be highly effective for earthquake mitigation. However, their effectiveness is limited to a specific domain of cases and is confined by various constraints that have to be met. In this study, a hybrid floor slab tuned mass damper and isolation system is introduced whereby the floor slabs are allowed to move relative to the main frame. The floor slabs are resting on curved supports to allow for self-centering of the slabs upon the conclusion of the seismic event. An optimized design of the curved supports and friction between the supports and the slabs can reduce the response of the structure by up to 40%. The optimization strategy is employed over a range of frequencies in order to minimize the response for any input. The results show an improved system behavior with decreased displacement, acceleration, and inter-story drift. The proposed system is shown to not only be quite effective, but also much more robust than conventional isolation strategies. The floor slab mass is uncoupled from that of the main frame through isolation while emulating the function of a tuned mass damper system with inherently much higher mass ratio; hence the improved response.
Hybrid Tuned Mass Damper and Isolation Floor Slab System Optimized for Vibration Control
Engle, Travis (author) / Mahmoud, Hussam (author) / Chulahwat, Akshat (author)
Journal of Earthquake Engineering ; 19 ; 1197-1221
2015-11-17
25 pages
Article (Journal)
Electronic Resource
English
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