Performance Validations of Semiactive Controllers on Large-Scale Moment-Resisting Frame Equipped with 200-kN MR Damper Using Real-Time Hybrid Simulations
Publication: Journal of Structural Engineering
Volume 140, Issue 10
Abstract
Magnetorheological dampers (MR) have the promising ability to mitigate seismic hazard for structures because of their adaptive energy dissipation characteristics and low power requirements that can be met using standby batteries. These attractive characterstics of advanced damping devices, such as MR dampers, are important for achieving the goals of performance-based infrastucture designs. This paper validates the performances of four semiactive control algorithms for the control of a large-scale realistic moment-resisting frame using a large-scale 200-kN MR damper. To conduct this test, a large-scale damper-braced steel frame was designed and fabricated. Four semiactive controllers, namely (1) passive on, (2) clipped optimal controller, (3) decentralized output feedback polynomial controller, and (4) Lyapunov stability based controller, were designed for this frame. Real-time hybrid simulations (RTHS) were carried out for these controllers using three recorded earthquakes. The comparative performance of these controllers was investigated using both RTHS and numerical simulations in terms of reductions in the maximum interstory drifts, displacements, absolute accelerations, and control forces, and comparisons between test and numerical results.
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Acknowledgments
This paper is based on work supported by the National Science Foundation under Grant No. CMMI 1011534. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Additionally, the use of the RTMD facility at the NEES@Lehigh laboratory to conduct the RTHS (supported by the National Science Foundation CMMI Directorate under Cooperative Agreement Number CMMI-0927178) and the utilization of the large-scale MR dampers owned by Dr. Richard Christenson are greatly appreciated. Lastly, the support of Gary Novak, Thomas Marullo, Peter Bryan, and all other staff at Lehigh was instrumental in conducting the RTHS tests carried out in this project.
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Published In
Journal of Structural Engineering
Volume 140 • Issue 10 • October 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Feb 7, 2013
Accepted: Oct 24, 2013
Published online: May 12, 2014
Published in print: Oct 1, 2014
Discussion open until: Oct 12, 2014
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