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Q: Pick up the incorrect statement from the following: Tensile reinforcement bars of a rectangular beam .........
  • A. are curtailed if not required to resist the bending moment
  • B. are bent up at suitable places to serve as shear reinforcement
  • C. are bent down at suitable places to serve as shear reinforcement
  • D. are maintained at bottom to provide at least local bond stress
Correct Answer: Option C - Bent up bars is also used along with stirrups in the post to carry some of the applied shear force. • In the case where all the tensile reinforcement is not needed to resist bending moment, some of the tensile bars were bent up in the reason of high shear to form the inclined legs of shear reinforcement. • Tension resist flexure failure and therefore, bars must be curtailed from the point where is no need to resist bending moment. For Ex, in the simply supported beam since the moment is nearly zero at the ends and the tension stresses also reduces so the tension bars are curtailed.
C. Bent up bars is also used along with stirrups in the post to carry some of the applied shear force. • In the case where all the tensile reinforcement is not needed to resist bending moment, some of the tensile bars were bent up in the reason of high shear to form the inclined legs of shear reinforcement. • Tension resist flexure failure and therefore, bars must be curtailed from the point where is no need to resist bending moment. For Ex, in the simply supported beam since the moment is nearly zero at the ends and the tension stresses also reduces so the tension bars are curtailed.

Explanations:

Bent up bars is also used along with stirrups in the post to carry some of the applied shear force. • In the case where all the tensile reinforcement is not needed to resist bending moment, some of the tensile bars were bent up in the reason of high shear to form the inclined legs of shear reinforcement. • Tension resist flexure failure and therefore, bars must be curtailed from the point where is no need to resist bending moment. For Ex, in the simply supported beam since the moment is nearly zero at the ends and the tension stresses also reduces so the tension bars are curtailed.