What is punching shear?
✓The weight of a slab supported on a column induces shear stresses in the slab.
✓ These stresses, if sufficient and where additional reinforcement is not provided, would result in the column ‘punching’ through the slab.(shown in image above)
✓Punching shear failures arise from the formation of diagonal tension cracks around the loaded area, which result in a conical failure surface as illustrated in Fig.
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