Which outcome arises due to sustained loading on a pre-stressed concrete beam close to its design limit?

💡 Explanation

When a pre-stressed beam experiences sustained loading near design limits, stress distribution occurs as concrete creep develops due non-linear material behavior and load history, leading to increased stress in the concrete and steel regions. Therefore progressive redistribution of pre-stressing occurs, as opposed to elastic modulus change, decreased relaxation or tensile strength amplification which don't account for sustained load effects.

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