If there is reverse curvature of tendons, what could happen?

Reverse curvature of tendons refers to a situation in prestressed concrete where the tendons curve in the opposite direction of the applied load. This can lead to a condition where the tendons may not distribute forces evenly across the structure, potentially resulting in spalling of concrete.

Spalling occurs when the concrete surface begins to chip or flake away, which can be exacerbated during stressing operations if the tendons are not properly aligned. This misalignment can increase stress concentrations on specific areas of the concrete, leading to cracking or spalling. Therefore, this effect highlights the importance of proper tendon placement and tensioning in order to maintain the durability and integrity of the structure.

This understanding is crucial for construction professionals who must ensure that tendons are positioned and stressed correctly to avoid adverse effects such as concrete spalling, which can compromise the overall safety and longevity of the structure.