👉Punching shear

💫It is a type of failure that occurs in flat slabs or foundations when they are subjected to high concentrated loads, such as columns.

⏺The failure happens in a circular shape around the load, creating a cone-shaped perforation in the slab.

⏺This is a brittle and dangerous failure mode that requires careful design and verification

⭐️To prevent punching shear, engineers need to consider the following steps:

- Check if the concrete is strong enough alone;
- If not, check if the amount of reinforcement is reasonable;
- Design reinforcement if reasonable, if not, change the form of structure.

❇️Some examples of reinforcement methods are using vertical bars, drop panels, or flared column heads. Alternatively, some codes of practice may allow more liberal design assumptions

🔰Punching shear is a complex phenomenon that involves many factors, such as slab thickness, column size, load magnitude, concrete strength, and reinforcement ratio.

⏺To accurately predict the punching shear strength and design the appropriate reinforcement, engineers need to use advanced methods, such as the finite element method

📜I hope this helps you understand what punching shear is and how to prevent it.

@etconp