Influence of the Distribution and Level of Post-Tensioning Force on the Punching Shear of Flat Slabs

Punching shear is the most common failure mechanism of slabs that are supported directly on columns. The slab–column connection always vulnerable to critical punching shear; thus, it necessary investigate effect various parameters behavior flat slabs. This work presents an experimental study evaluate level prestressing force and layout strands in terms maximum load, deflection, stiffness, ductility, absorbed energy. Five square post-tension (2000 mm × 2000 mm) with 150 thickness were tested. Increasing increased load ductility a delay damage case uniformly distributed strands. Additionally, banded post-tensioning significantly capacity post-tensioned at all levels prestressing. influence slab clearly visible cases high as decreases when compared same Finally, predicted values ultimate using different codes, including Egyptian Code Practice (ECP-203), American Building code (ACI-318), CEB-FIP Model Euro code, strength non-post-tensioned