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Which risk increases when sustained tensile stress causes the yielding of steel rebar within reinforced concrete?

A)Reduced concrete spalling resistance
B)Decreased composite beam moment capacity
C)Enhanced thermal expansion allowance
D)Increased elastic modulus overestimation

💡 Explanation

Decreased ultimate bending strength occurs, because the **steel yielding** reduces the rebar's ability to withstand tensile forces, therefore lowering beam moment capacity, rather than improving resistance to spalling or thermal expansion, causing elastic modulus overestimation.

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