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← TechnologyWhich 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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