Title:
Transition between Shear and Punching in Reinforced Concrete Slabs: Review and Predictions with ACI Code Expressions
Author(s):
Alex M. D. de Sousa, Eva O. L. Lantsoght, and Mounir K. El Debs
Publication:
Structural Journal
Volume:
120
Issue:
2
Appears on pages(s):
115-128
Keywords:
one-way shear; one-way slabs; punching shear; slabs under concentrated loads; transitional shear failure modes
DOI:
10.14359/51738350
Date:
3/1/2023
Abstract:
One-way slabs under concentrated loads may fail by one-way
shear, two-way shear, flexure, or a combination of these modes. This paper reviews shear and punching shear-failure mechanisms of one-way slabs under concentrated loads tested from the literature and investigates the accuracy of different approaches to predict the ultimate capacity for such slabs using the ACI code expressions. A database with 160 test results was evaluated. Shear and concentrated loads measured at failure were reviewed according to parameters such as the load position, slab width, and reinforcement ratios. The load position and slab width play a marked influence on the failure mechanism and tested loads. The analyses improved the understanding of the main parameters influencing the
behavior of one-way slabs under concentrated loads. Finally, the proposed effective shear width expression enables accurate shear capacity predictions using the ACI code expressions.
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