Implementable Bio-Inspired Passive Negative Spring Actuator for Full-Scale Structural Control under Seismic Excitation
Publication: Journal of Structural Engineering
Volume 142, Issue 1
Abstract
A bio-inspired passive negative spring actuator inspired by an energy-dissipating mechanism called sacrificial bonds and hidden length is designed, fabricated and implemented in a test case of a three-story structural model for testing its performance and demonstrating the effectiveness as a passive controller. Specifically, a unique design of a negative spring actuator is developed and combined with a viscous damper to exhibit aspects of the force-displacement relation of negative sacrificial bonds and hidden length. This novel actuator can output a unique force-displacement profile, capable of large control forces, making the bio-inspired passive actuator practical for implementation in real structures. Results obtained from numerical simulation were validated experimentally on a model structure. The results showed that the bio-inspired passive negative spring actuator has comparable structural control performance to state-of-the-art semiactive actuators. Therefore, the actuator could be a practical, low-cost, and effective passive-control device for use in civil, mechanical, aerospace, and other structures.
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Acknowledgments
This study is sponsored by the National Science Foundation grant CMMI-1014958. The guidance of program director, Dr. B. M. Kramer, is gratefully acknowledged. The authors acknowledge Daniel Bridges, research assistant, for his help in setting up shake table and data acquisition.
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Published In
Journal of Structural Engineering
Volume 142 • Issue 1 • January 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Feb 14, 2014
Accepted: Mar 13, 2015
Published online: Jun 10, 2015
Discussion open until: Nov 10, 2015
Published in print: Jan 1, 2016
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