Design and Evaluation of Tuned Inerter-Based Dampers for the Seismic Control of MDOF Structures
Publication: Journal of Structural Engineering
Volume 143, Issue 4
Abstract
The tuned viscous mass damper (TVMD) and tuned inerter damper (TID) are tuned inerter-based dampers (TIBDs) that can utilize amplified apparent mass and tuning effects. This study investigated the use of multiple TIBDs to mitigate the seismic responses of multi-degree-of-freedom (MDOF) structures. The locations and modes for tuning the TIBDs were analyzed by defining a placement index based on the norm. The parameters of TVMDs and TIDs distributed throughout the structure and tuned to multiple modes were optimized by minimizing the performance of the objective responses. The equivalent stiffness and damping of the TVMD and TID were considered to demonstrate TIBD control mechanisms, such as significant additional damping at the resonance frequency. As examples, 3-story and 10-story buildings were subjected to earthquakes with different spectra characteristics to validate the effectiveness of TIBD schemes. The results showed that distributed TIBDs tuned to properly selected modes significantly reduce the root-mean-square (RMS) responses of displacement and acceleration and perform superior than the viscous dampers and viscous mass dampers in reducing the peak displacement.
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Acknowledgments
The authors acknowledge the financial support provided by the National Natural Science Foundation of China (Grant No. 51578048), the Major Research Project of the National Natural Science Foundation of China (Grant No. 91215302), and the Fundamental Research Funds for the Central Universities (Grant No. 2016JBM047).
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©2016 American Society of Civil Engineers.
History
Received: Nov 3, 2015
Accepted: Aug 17, 2016
Published online: Nov 4, 2016
Published in print: Apr 1, 2017
Discussion open until: Apr 4, 2017
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