Abstract
Soft real-time hybrid simulation (S-RTHS) is a novel seismic test method for structures. It combines pure finite element simulation with laboratory physical component tests, and can lead to a more realistic simulation of real-time effects of seismic action on specimens. Based on the OpenFresco test communication platform and an MTS electro-hydraulic servo loading system, a systematical study on the technological application of S-RTHS is presented in this paper. A single-story, single-span space steel frame was taken as a prototype, a column was taken as an experimental substructure, and the remaining part of the structure was taken as a numerical substructure to be simulated in OpenSEES. S-RTHS with bidirectional loading was performed, and the boundary conditions of the experimental substructure were simulated and analyzed. The results from the pure numerical simulations and S-RTHS were compared along with the responses from these simulations. The command displacement and feedback displacement of the system were discussed to verify the accuracy and stability of the S-RTHS. Finally, a comparison with the slow substructure hybrid simulation test results shows that the S-RTHS can better simulate the dynamic response of the experimental substructure.
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Acknowledgements
The authors are grateful for the financial support from the National Natural Science Foundation of China (Grant No. 51178382). Thank Dr. Shawn You of MTS Systems Corporation for his guidance and help in the entire real-time hybrid simulation experiment.
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Li, T., Ma, L., Sui, Y. et al. Soft real-time hybrid simulation based on a space steel frame. Bull Earthquake Eng 18, 2699–2722 (2020). https://doi.org/10.1007/s10518-020-00798-z
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DOI: https://doi.org/10.1007/s10518-020-00798-z