Experimental Parameter Study of Two-Story Platform-Type CLT Shear Walls
Publication: Journal of Structural Engineering
Volume 150, Issue 8
Abstract
While numerous experimental tests have been conducted on single-story cross-laminated timber (CLT) shear walls, research addressing the drift performance of multistory CLT structures remains limited. This paper presents an experimental parameter study of the lateral performance of two-story platform-type CLT shear wall structures utilizing self-tapping screw connections. The test program consisted of six reversed cyclic tests investigating the impact of: (1) additional floor mass; (2) different angle bracket connections between floors; (3) different tension strap connections between floors; and (4) acoustic insulation layers on both sides of the first-level floor. The results showed that additional dead load increased the lateral resistance and that designing angle brackets to remain elastic limited the sliding contribution to total lateral deformations to less than 10%. The results also showed that the acoustic layer had minimal effect on the performance of the shear walls under the tested conditions. The tension straps significantly influenced the rocking performance, underscoring their importance to achieve similar story drifts in multistory CLT shear wall structures. Finally, while preceding single-story shear wall tests allowed designing the structures, hold-down uplifts on single-story tests were shown not to be representative for tension strap uplifts in multistory tests.
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Data Availability Statement
Some or all data that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The project was funded by the government of British Columbia through a Forest Innovation Investment grant to Dr. Tannert. The support by the UNBC technicians Michael Billups, James Andal, and Ryan Stern and by student research assistant Juan Jaimes Pico is greatly appreciated. CLT panels and screws were provided by Kalesnikoff and MTC Solutions, respectively.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 150 • Issue 8 • August 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Sep 26, 2023
Accepted: Feb 26, 2024
Published online: Jun 7, 2024
Published in print: Aug 1, 2024
Discussion open until: Nov 7, 2024
ASCE Technical Topics:
- Building materials
- Buildings
- Connections (structural)
- Engineering fundamentals
- Engineering materials (by type)
- Floors
- Laboratory tests
- Low-rise buildings
- Materials engineering
- Mid-rise buildings
- Shear tests
- Shear walls
- Structural engineering
- Structural members
- Structural systems
- Structures (by type)
- Tests (by type)
- Walls
- Wood and wood products
Authors
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