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← TechnologyWhich risk increases for a reinforced concrete column under sustained axial compression due to rebar creep?
A)Buckling due to reduced stiffness
B)Spalling from increased concrete stress✓
C)Corrosion from microcrack formation
D)Shear failure from altered stress distribution
💡 Explanation
Under sustained load, rebar creep causes gradual shortening that transfers stress to the concrete because of load redistribution, leading to surface spalling due to exceeded compressive stress. Therefore spalling risk increases, rather than buckling, crack formation, or shear failure, which require other trigger conditions.
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