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Concrete slab punching shear failure

June , 8th 2017 | Via: @Engineer_Luca_bellini | Seen: 5935 times
Example of a concrete slab punching shear failure. In this other picture you will find another example of punching shear force failure. ¡Awesome!

Punching shear failure in concrete is a critical type of failure that occurs when a concrete slab or beam, typically in structures like floor slabs or foundation slabs, cannot withstand concentrated loads in an area near a support or column. This failure happens when the shear forces in the concrete exceed its resistance capacity, resulting in the formation of cracks and ultimately leading to the collapse of the structure. Punching shear failure is particularly hazardous due to its sudden and catastrophic nature.

Calculate the resistance to this type of failure using our punching shear verification online tool.
Concrete slab punching shear failure
To prevent punching shear failure in concrete structures, it is crucial to take preventive measures during design and construction:

1. Proper Design: A well-conceived structural design is paramount to prevent punching shear failure. This involves accurately determining the loads that will act on the structure and appropriately sizing the support areas and distribution of reinforcement in critical areas near columns.

2. Adequate Reinforcement: The use of proper reinforcement, such as reinforcement steel bars or mesh, in critical areas can significantly enhance the load-carrying capacity and resistance to concrete punching. These reinforcements redistribute forces and strengthen the region around columns, minimizing the risk of cracks and collapses.

3. Construction Details: Proper execution of construction details is essential. This includes ensuring the correct placement of reinforcement bars, avoiding stress concentrations, and ensuring that concrete is poured and compacted uniformly around the columns.

4. Proper Thickness and Dimensions: Ensure that slab thickness and dimensions are adequate to withstand applied loads. Insufficient dimensions can increase the risk of punching shear failure.
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