Which behavior occurs in a reinforced concrete beam when subjected to sustained high bending stress near yield strength?

💡 Explanation

Under high, sustained bending stress, concrete undergoes creep, wherein there is gradual deformation over time because the sustained stress allows slow rearrangements in the material's microstructure, leading to increased deflection. Therefore, increased deformation and deflection result, rather than stronger bond, spalling, or decreased cracking, which are caused by different phenomena.

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