What term describes the tension found at the bottom of a concrete deck, positioned between beams?

The term that accurately describes the tension found at the bottom of a concrete deck, positioned between beams, is positive moment tension. In structural engineering, particularly when analyzing bridge decks supported by beams, moments are generated by loads applied to the structure.

When a load is applied to a bridge deck, it causes bending moments at various points. The area under the load experiences a positive bending moment, which means the top fibers of the concrete will be in compression while the bottom fibers will experience tension. This is typical in simply supported beams, where the maximum positive moment occurs between supports due to the load.

Understanding positive moment tension is crucial as it influences design considerations, reinforcing strategies, and the overall structural integrity of the bridge. The tension at the bottom of the deck is critical for ensuring that the deck can safely handle the expected loads without experiencing structural failure.