Which risk is heightened when post-tensioned concrete beam tendons experience unexpected slippage during anchoring?

💡 Explanation

When tendons slip during anchoring, the intended stress distribution changes because the full prestressing force is not effectively transferred to the concrete, upsetting the equilibrium of internal forces. Therefore unbalanced bending moment results, rather than concentrated shear stress, reduced concrete strength or rebar fatigue which arise from different loading conditions.

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