Which risk increases when significant corrosion reduces the cross-sectional area of a steel I-beam within a bridge structure?

💡 Explanation

When the cross-section diminishes from corrosion, stress concentrations increase at corrosion pits because remaining material must bear the original load, leading to faster fatigue crack growth when cyclic loads are present. Therefore faster crack growth results, rather than buckling, yielding, or creep that require different stress and temperature conditions.

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