Abstract
The impact of openings and moment transfer on punching shear resistance was investigated by conducting tests on nine interior slab-column connections measuring 2,400 mm square and 150 mm thick. The connections were subjected to different unbalanced moment orientations with eccentricities of 250 mm and 500 mm, and without shear reinforcement. The openings, located on the faces of the rectangular supports, had widths of either 200 mm × 200 mm or 200 mm × 300 mm. The study analysed ultimate loads, vertical displacements, flexural reinforcement strains, and concrete strains. The experimental punching strength was compared to theoretical predictions according to ACI 318:19, fib MC 2010:13, for different levels of approximation and the 2nd generation of Eurocode 2 prEN 1992-1-1:21. Observations are provided regarding the code’s calculation for slabs with openings.
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