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← TechnologyWhich risk increases when differential settlement occurs beneath a pre-stressed concrete beam supporting a bridge deck?
A)Fracture of pre-stressing strands✓
B)Corrosion of reinforcing steel
C)Buckling of the concrete deck
D)Delamination of epoxy coating
💡 Explanation
When differential settlement occurs, stress redistribution exceeds design limits because the soil support is uneven, placing excessive tensile force on some strands, causing them to fail. Therefore, fracture is the key risk, rather than corrosion or buckling which require different trigger mechanisms, specifically excessive moisture or excessive compression.
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