Question

In case of prestressed concrete members, the bursting stresses develops at

• A. Bond zone
• B. Maximum bending moment zone
• C. Maximum shear stress zone
• D. Anchorage zone

Answer 1

The correct option is D Anchorage zone

The zone between the end of the beam and the section where only longitudinal stress exists is generally referred to as the anchorage zone or end block.
In the anchorage zone or the end block of a post-tensioned prestressed concrete element, the state of stress-distribution is complex and three-dimensional in nature. In most post-tensioned members, the prestressing wires are introduced in cable holes or ducts, pre-formed in the members, and then stressed and anchored at the end faces. As a result of this, large forces, concentrated over relatively small areas, are applied on the end blocks.