Consider the following statements; 1) In a reinforced concrete member subjected to flexure, the externally applied moment is resisted by an internal couple formed by steel and concrete and their magnitudes vary with the applied moment, while the lever arm of the internal couple remains constant 2) In a prestressed concrete. Member, the external moment is resisted by an internal couple, but it is the lever arm that changes with the loading conditions and the stress in steel remain practically constant Which of the above statements is/are correct?

1 only
2 only
Both 1 and 2
Neither 1 nor 2

LohaHridoy

5 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 3 : Both 1 and 2

The following table gives the difference between Reinforced cement concrete (R.C.C) and Prestress concrete (P.S.C).

Reinforced cement concrete (R.C.C)	Prestress concrete (P.S.C)
In R.C.C the concrete in the compression zone is effective and that in tension zone is ineffective	In P.S.C the concrete is effective in the entire section
R.C.C sections are heavier. They need shear reinforcement besides longitudinal reinforcement	P.S.C sections are lighter compared to R.C.C. curved tendons are provided.
In R.C.C high strength concrete and high strength steel are not required	In P.S.C high strength concrete and high strength steel are provided.
The externally applied moment is resisted by an internal couple formed by steel and concrete.	The lever arm changes with the loading, but the loading conditions and stress in steel remain constant.

5 views Answered 2022-09-04 04:29

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