Performance of Beam-Column Connections with Mass Ply Lam and Steel Dowels under Cyclic Loads
Publication: Journal of Structural Engineering
Volume 149, Issue 6
Abstract
A mass timber lateral force resisting system (LFRS) is proposed using a mass timber buckling restrained brace (TBRB) to improve the seismic resilience of mass timber buildings. To develop a resilient braced frame, it is essential to understand and quantify the behavior of the connections, including the possible failure modes and moment-rotation capacities. Cyclic and monotonic tests were conducted on six mass timber beam-column connections to study the response of a mass timber joint connected with slotted-in steel plates and mild steel dowels. The primary goal of the subassembly tests was to measure the maximum rotation, stiffness, ductility, and failure modes of such connections for both monotonic and cyclic loads. The tests showed that the connections with three steel dowel details reached a maximum rotation of 0.11 radians (6.3 degrees) with no loss of strength. In addition, a numerical model was developed to represent the moment-rotation relationship of the mass timber beam-column connections.
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Data Availability Statement
Some or all data, models or code that supports the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors would like to acknowledge the financial support provided by Wood Innovations under USDA Grant 20-DG-11046000-615. The authors also acknowledge the donation of materials by Freres Lumber Co., and the in-kind assistance provided by the Timberlab. The authors acknowledge the assistance of M. Bryant, D. Tran, I. Dangol, D. Briggs, S. Neupane, and S. Shrestha of the University of Utah for their assistance in carrying out the experiments.
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© 2023 American Society of Civil Engineers.
History
Received: Apr 12, 2022
Accepted: Dec 16, 2022
Published online: Mar 28, 2023
Published in print: Jun 1, 2023
Discussion open until: Aug 28, 2023
ASCE Technical Topics:
- Beam columns
- Beams
- Building materials
- Columns
- Connections (structural)
- Construction engineering
- Construction methods
- Cyclic tests
- Dowels
- Engineering fundamentals
- Engineering materials (by type)
- Fastening
- Laboratory tests
- Materials engineering
- Models (by type)
- Numerical models
- Plates
- Steel beams
- Steel plates
- Structural engineering
- Structural members
- Structural systems
- Tests (by type)
- Wood and wood products
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Cited by
- Emily Williamson, Chris P. Pantelides, Hans-Erik Blomgren, Douglas Rammer, Nonlinear Models of Multistory Timber Frames with Timber Buckling-Restrained Braces, Journal of Structural Engineering, 10.1061/JSENDH.STENG-13137, 150, 9, (2024).
- Emily Williamson, Chris P. Pantelides, Hans-Erik Blomgren, Douglas Rammer, Seismic Performance of Timber Frames with Timber Buckling-Restrained Braces, Journal of Structural Engineering, 10.1061/JSENDH.STENG-12877, 150, 6, (2024).
- Emily Williamson, Chris P. Pantelides, Hans-Erik Blomgren, Douglas Rammer, Design and Cyclic Experiments of a Mass Timber Frame with a Timber Buckling Restrained Brace, Journal of Structural Engineering, 10.1061/JSENDH.STENG-12363, 149, 10, (2023).