Question

In post-tensioned prestressed concrete beam, the end block zone is the zone between the end of the beam and the section where

• A. no lateral stresses exist
• B. only longitudinal stresses exist
• C. only shear stresses exist
• D. the shear stresses are maximum

Answer 1

The correct option is B only longitudinal stresses exist

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. According to St. Venant's principle, the zone between the end of the beam where only longitudinal stresses exists is generally referred to as the anchorage zone or end block.