Abstract
Prestressed and reinforced concrete flat plates are susceptible to failure due to punching shear. Modeling the punching shear strength of prestressed concrete slabs poses conceptual challenges, as it involves various factors, including the bonding of tendons, stress in tendons during punching failure (which can be indeterminate), tendon banding, and the presence of draped tendons that yield a beneficial vertical component of the prestressing force. Additionally, prestressed concrete slabs typically require supplementary bonded reinforcement. The objective of this research is to comprehensively investigate the physical behavior of each test specimen, considering parameters such as deflections, crack patterns, crack widths, mode of failure, and to compare the punching shear resistance of interior slab-column connections with various code provisions. The study involved testing a total of five interior slab-column connections, each measuring 1600×1600 mm in size, 80 mm in thickness, with square columns of 180×180 mm and a height of 300 mm. Keywords: Slab, Punching, Shear, Design, Codes, prestressing.
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