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Q: Which one of the following statements is correct?
  • A. Shear cracks start due to high diagonal tension in case of beam with their webs and high prestressing force
  • B. Shear design for a prestressed concrete beam is based on elastic theory
  • C. In the zone where bending moment is dominant and shear is insignificant, cracks occur at 20⁰ to 30⁰
  • D. After diagonal cracking, the mechanics of shear transfer in a prestressed concete member is very much different from that in reinforced concrete members.
Correct Answer: Option B - In shear design for a prestressed concrete beam is based on elastic theory. • In case of prestress concrete very high strain steel and high strain concrete is used. • It's designing based on working stress method both concrete and steel behave elastically and hook's law is valid.
B. In shear design for a prestressed concrete beam is based on elastic theory. • In case of prestress concrete very high strain steel and high strain concrete is used. • It's designing based on working stress method both concrete and steel behave elastically and hook's law is valid.

Explanations:

In shear design for a prestressed concrete beam is based on elastic theory. • In case of prestress concrete very high strain steel and high strain concrete is used. • It's designing based on working stress method both concrete and steel behave elastically and hook's law is valid.