Shear Failure of RC Beam - Concrete Laboratory Testing

Longitudinal steel bars have been provided to resist the tensile forces in the bottom of the beam due to bending (or flexure).

Rectangular steel links would normally be provided to resist the tensile forces in the beam due to shear.

In the beam shown in below video, shear links have not been provided. So, the beam experiences a sudden, brittle, shear failure as the applied load exceeds the shear capacity of the concrete. Also, note that how a diagonal crack forms suddenly between the left-hand support and the applied load.

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