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The extreme stress at the top and bottom edges of a prestressed beam when tendons are placed along the longitudinal axis of the beam are

The extreme stress at the top and bottom edges of a prestressed beam when tendons are placed along the longitudinal axis of the beam are Correct Answer <span class="math-tex">\(\frac{P}{A} \pm \frac{M}{Z}\)</span>

Concept:

Prestressed Beam:

  • Prestressed beam concrete is a form of concrete used in construction.
  • In a prestressed concrete member, the internal stresses are introduced in a planned manner so that. the stresses resulting from the superimposed loads are counteracted to the desired degree.


Stress distribution:

Additional Information

Assumptions:

  • Concrete is homogenous, elastic, material.
  • Stress variation in steel due to external load is negligible.
  • Hooke's law is valid.
  • The plane section before bending remains plane after bending.
  • Stress in reinforcement does not change along with the member.

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