Hybrid Seismic Response Simulation on a Geographically Distributed Bridge Model
Publication: Journal of Structural Engineering
Volume 134, Issue 4
Abstract
The hybrid simulation test method is a versatile technique for evaluating the seismic performance of structures by seamlessly integrating both physical and numerical simulations of substructures into a single test model. Using hybrid simulation, the seismic response of complex structural systems partitioned into multiple large-scale experimental and numerical substructures at networked geographically distributed experimental and computational facilities can be evaluated. A scalable framework with a fault-tolerant distributed controller is presented to support the implementation of advanced hybrid testing methods with distributed substructures. The control strategy is based on a multithreaded simulation coordinator for parallel communication with remote sites and an event-driven controller at each remote experimental site to implement continuous loading. The distributed controller provides faster rates of testing and improved accuracy in the simulation results. The effectiveness of the proposed framework is demonstrated by computing the earthquake response of a six-span bridge model with multiple remote experimental and numerical column substructures distributed within NEES laboratories across the United States. Further, the distributed tests were implemented using a secure network link between the testing sites that was developed for the NEES cyber infrastructure.
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Acknowledgments
This work was supported in part by the NEES Program of the National Science Foundation under Award Nos. NSFCMS-0086621 and NSFCMS-0086611/12. Their support is gratefully acknowledged. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the writers and do not necessarily reflect those of the National Science Foundation. The writers worked closely with the NEES System Integration team (Bill Spencer, Sridhar, Ghallapalli, and Laura Pearlman), University of Colorado at Boulder (Benson Shing and Eric Stauffer), Lehigh University (Jim Ricles and Peter Bryant), University of Illinois at Urbana Champaign (Narutoshi Nakata, Juan Carrion), University of California at Berkeley (Andreas Shellenberg, Tony Yang), and University at Buffalo (Xiaoyun Shao, Scot Weinreber). Their contribution is sincerely appreciated.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 134 • Issue 4 • April 2008
Pages: 535 - 543
Copyright
© 2008 ASCE.
History
Received: Jul 5, 2006
Accepted: Mar 9, 2007
Published online: Apr 1, 2008
Published in print: Apr 2008
Notes
Note. Associate Editor: Finley A. Charney
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