Bio-Inspired Passive Optimized Base-Isolation System for Seismic Mitigation of Building Structures
Publication: Journal of Engineering Mechanics
Volume 142, Issue 1
Abstract
An energy dissipation mechanism of abalone shells, called sacrificial bonds and hidden length, is simulated and proposed to develop new strategies for base isolation. The concept of integrating this novel energy dispersion mechanism into a conventional linear isolator is proposed. A systematic parametric study is performed to evaluate the influences of the properties of both the isolation layer and the structure on the structural seismic responses to a series of earthquake records. Using the insights gained from the parametric study, an optimization procedure for designing such a bio-inspired isolator is presented based on the multiobjective optimization approach. To demonstrate the advantages of this idea, the optimized bio-inspired isolation system is numerically investigated by first comparing it with the passive isolators such as a high-damping linear isolator and a lead rubber bearing system. The proposed isolator is found to have superior performance to conventional passive isolation systems, especially in cases of near-fault earthquakes. Furthermore, the bio-inspired passive isolator shows comparable performance to a semiactive isolation system under the selected earthquake excitations.
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Acknowledgments
This study is sponsored by the U.S. National Science Foundation (Grant No. CMS 1014958) and the Chinese Fundamental Research Funds for the Central Universities (Grant No. 2013KJ041).
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Published In
Journal of Engineering Mechanics
Volume 142 • Issue 1 • January 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Sep 21, 2014
Accepted: Apr 29, 2015
Published online: Jun 10, 2015
Discussion open until: Nov 10, 2015
Published in print: Jan 1, 2016
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