Self-Centering Rotational Joints for Seismic Resilient Steel Moment Resisting Frame
Publication: Journal of Structural Engineering
Volume 149, Issue 2
Abstract
A novel self-centering rotational joint (SCRJ) was proposed to replace the plastic hinge at the beam end to achieve a seismic resilient frame without diminishing the structural usability. The quasi-static cyclic tests of the SCRJs with different sets of friction components and disc springs were conducted, with the results showing that the precompressive force, stiffness of the compressive force, and slope angle of the right helicoid surfaces can significantly affect the hysteresis behavior. The hysteresis curve of the SCRJ demonstrates a flag shape with four characteristic states: activation state, ultimate state, reversal activation state, and deactivation state. The displacement-based design approach was adopted for the resilient steel moment resisting frame structure with the SCRJs based on which a six-story resilient frame structure was designed with the SCRJs at the beam ends. The nonlinear dynamic analysis shows that the interstory drift ratio and residual interstory drift ratio of the resilient frame structure can meet the design objectives, in which the SCRJs reach the plastic state (caused by geometric nonlinearity) more easily than conventional plastic hinges (caused by material plasticity), resulting in larger deformations, and can effectively dissipate seismic energy and protect the main frame from yielding under the rarely occurring earthquake (ROE) level.
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Data Availability Statement
The test and numerical results are available from the corresponding author upon reasonable request.
Acknowledgments
The authors would like to acknowledge the support from the “National Natural Science Foundation of China (No. 52108440),” “Natural Science Foundation of Jiangsu Province (No. BK20210253),” “Project Funded by China Postdoctoral Science Foundation (No. 2021M690620),” “Jiangsu Planned Projects for Postdoctoral Research Funds (No. 2021K263B),” “Scientific Research Fund of Multi-Functional Shaking Tables Laboratory of Beijing University of Civil Engineering and Architecture (No. 2021MFSTL01),” and “Ministry of Science and Technology of the People’s Republic of China (No. 2018YFE0206100).”
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Published In
Journal of Structural Engineering
Volume 149 • Issue 2 • February 2023
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Mar 5, 2022
Accepted: Oct 11, 2022
Published online: Dec 5, 2022
Published in print: Feb 1, 2023
Discussion open until: May 5, 2023
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Cited by
- Tong Guo, Jishuai Wang, Xinqiang Ji, Lianglong Song, Yong Sun, Yunwen Zhang, Seismic Resilience Enhancement of Irregular Space Structure Using Friction-Damped Self-Centering Tension Braces, Journal of Structural Engineering, 10.1061/JSENDH.STENG-13024, 150, 3, (2024).