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Q: The assumption made in the theory of reinforced cement concrete beam is that
  • A. All the tensile stresses are taken up by the steel reinforcement only
  • B. The steel and concrete are stressed within its elastic limit
  • C. There is sufficient bond between steel and concrete
  • D. All options are correct
Correct Answer: Option D - Theory of reinforced cement concrete beam – Assumption – Plane section normal to the axis remain plane after bending. • All the tensile stress are taken up by the steel reinforced only. • The steel and concrete are stressed within its elastic limit. • There is sufficient bond between steel and concrete. • Maximum compressive strain in concrete is 0.0035 the stress strain curve of concrete can be assumed to be any shape which has substantial agreement with the test result.
D. Theory of reinforced cement concrete beam – Assumption – Plane section normal to the axis remain plane after bending. • All the tensile stress are taken up by the steel reinforced only. • The steel and concrete are stressed within its elastic limit. • There is sufficient bond between steel and concrete. • Maximum compressive strain in concrete is 0.0035 the stress strain curve of concrete can be assumed to be any shape which has substantial agreement with the test result.

Explanations:

Theory of reinforced cement concrete beam – Assumption – Plane section normal to the axis remain plane after bending. • All the tensile stress are taken up by the steel reinforced only. • The steel and concrete are stressed within its elastic limit. • There is sufficient bond between steel and concrete. • Maximum compressive strain in concrete is 0.0035 the stress strain curve of concrete can be assumed to be any shape which has substantial agreement with the test result.