Which risk disproportionately increases in pretensioned concrete beams subjected to cyclic loading exceeding the concrete's endurance limit?

💡 Explanation

When concrete exceeds its endurance limit under cyclic loading, microcracks initiate and propagate at the concrete-strand interface because of fatigue, leading to progressive debonding of the prestressing strands. Therefore, debonding results, rather than shear, creep, or alkali-silica reactions each stemming from different degradation pathways.

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