Which risk significantly increases during concrete beam flexure when shear force exceeds capacity of stirrups?

💡 Explanation

When shear force exceeds stirrup capacity, shear stress concentrates, causing diagonal cracking through web because concrete's tensile strength is low. Therefore, diagonal cracking and brittle failure is more likely, rather than effects of reinforcement buckling, concrete creep, or freeze-thaw cycles which relate to different mechanisms.

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