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← TechnologyWhich performance loss occurs when temperature cycling weakens rebar?
A)Reduced concrete tensile stress capacity✓
B)Increased chance of metal fatigue
C)Lower vibration damping coefficient
D)Elevated thermal expansion mismatch
💡 Explanation
Reduced tensile stress support happens because temperature variations cause differential expansion leading to alternating expansion & contraction cycles in the rebar/concrete matrix, which weakens the bonding strength at the interface therefore tensile stress capacity reduces rather than fatigue since steel fatigue needs tensile stress presence.
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