What is the specific term for tension that occurs above beams at the top of a concrete deck?

The term that describes the tension occurring above beams at the top of a concrete deck is referred to as negative moment tension. This phenomenon is typically observed in continuous beams and bridges during loading. When loads are applied, the top portion of the span experiences tension due to bending moments that arise from the distribution of forces. In continuous spans, the moment near the supports creates tension above the beam, which is classified as a negative moment.

Understanding this concept is critical in bridge design and inspection because it helps engineers analyze stress points and potential failure areas within a structure. Recognizing where negative moment tension occurs informs decisions about reinforcement and general maintenance needs for in-service bridges, ensuring their safety and longevity.