Punching Shear Strength of Post-Tensioned Transfer Slab-Column Connections
Publication: Journal of Structural Engineering
Volume 148, Issue 7
Abstract
Current design codes specify the need for two-way shear strength analysis for prestressed slab-to-column connections. This paper is an investigative study of said interaction for post-tensioned (PT) transfer slabs. Two-way shear strength and failure mode of the tested PT slab specimens were evaluated. To analyze the interaction quantitatively, concentric compression tests were performed on recent PT transfer slabs having small shear span-to-depth ratios. Test parameters included the number and layout of post-tensioning reinforcement. The test results demonstrated that the two-way shear strength of the PT transfer slab specimens was 53%–87% greater than that of conventional RC transfer slab specimen. Increase was tied to concentrated layout of post-tensioning tendons rather than distributed layout. The two-way shear strengths of the test specimens were compared with predictions under current design methods for PT flat plates and the strut-tie model.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request.
Acknowledgments
This research was financially supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (Nos. 2018R1A2B6007559 and 2021R1A4A3030117). Partial support from the Engineering Research Institute at Seoul National University is also appreciated. The authors are grateful for the support of the authorities.
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Published In
Journal of Structural Engineering
Volume 148 • Issue 7 • July 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: May 28, 2021
Accepted: Feb 23, 2022
Published online: Apr 30, 2022
Published in print: Jul 1, 2022
Discussion open until: Sep 30, 2022
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