Experimental Investigation on Self-Centering Steel-Timber Hybrid Beam-Column Connections
Publication: Journal of Structural Engineering
Volume 149, Issue 3
Abstract
Self-centering heavy timber frames rely on the self-centering beam-column timber connections to limit damage and provide the recentering capability. However, low compressive strength and stiffness perpendicular to the grain of the timber columns have long been a design challenge, which yields low initial post-tensioning forces and possibly a significant loss of post-tensioning forces over the building service life. To address this issue, this paper proposes a new design solution for the self-centering steel-timber hybrid beam-column connections, in which the timber column is replaced by a steel-timber composite column. Cyclic tests were conducted on four beam-column connection specimens with post-tensioning. During the gap-opening, the composite column provided a stiff foundation to the timber beam. The hysteretic curves of all four connections were in a flag shape. Compared with self-centering beam-column timber connections that had the same geometry and material properties, the proposed connection had a larger connection stiffness and an improved efficiency of dissipating energy. After the cyclic loading, the loss of post-tensioning force of the proposed connection was also lower than that of the counterpart timber connections.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors gratefully acknowledge the support from National Natural Science Foundation of China (Grant No. 52222802), Shanghai Rising Star Program (21QA1409300), and CSCEC R&D project (Grant No. CSCEC-2021-Z-40). The authors also appreciate Rothoblaas, Ltd., for providing the self-tapping screws.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 149 • Issue 3 • March 2023
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Apr 13, 2022
Accepted: Oct 14, 2022
Published online: Dec 23, 2022
Published in print: Mar 1, 2023
Discussion open until: May 23, 2023
ASCE Technical Topics:
- Beam columns
- Beams
- Building materials
- Columns
- Connections (structural)
- Engineering fundamentals
- Engineering materials (by type)
- Hybrid methods
- Material mechanics
- Material properties
- Materials engineering
- Mechanical properties
- Methodology (by type)
- Steel beams
- Steel columns
- Structural engineering
- Structural members
- Structural systems
- Tension
- Wood and wood products
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Cited by
- Zheng Li, Zhen Wang, Minjuan He, Zhan Shu, Direct displacement-based design of steel-timber hybrid structure with separated gravity and lateral resisting systems, Journal of Building Engineering, 10.1016/j.jobe.2023.106216, (106216), (2023).