Experimental Investigation on Self-Centering Steel-Timber Hybrid Beam-Column Connections

AbstractSelf-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 yield...

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Bibliographic Details
Published in:Journal of structural engineering (New York, N.Y.) N.Y.), 2023-03, Vol.149 (3)
Main Authors: Li, Zheng, Chen, Fei, He, Minjuan, Long, Weiguo, Ou, Jiajia, Li, Minghao
Format: Article
Language:English
Subjects:
Beam-columns
Composite columns
Compressive strength
Cyclic loads
Energy dissipation
Material properties
Post-tensioning
Service life
Steel
Stiffness
Structural engineering
Technical Papers
Timber (structural)
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Summary:AbstractSelf-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.
ISSN:0733-9445
1943-541X
DOI:10.1061/JSENDH.STENG-11570