Which risk increases when post-tensioned concrete beams experience localized corrosion of prestressing strands?

A)Sudden brittle fracture under sustained load✓

B)Reduced ductility during seismic activity

C)Increased deflection due to creep buckling

D)Accelerated carbonation of surrounding concrete

💡 Explanation

When prestressing strands corrode, stress concentration occurs at the defects, reducing the cross-sectional area and increasing tensile stress, promoting crack propagation and embrittlement. Therefore sudden brittle fracture becomes more likely, rather than ductility reduction, deflection increase, or carbonation which result from different deterioration processes.

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Which risk increases when post-tensioned concrete beams experience localized corrosion of prestressing strands?

💡 Explanation

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