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Minimum shear reinforcement in beams is provided in the form of stirrups-
- a)To resist extra shear force due to live load
- b)To resist extra shear of shrinkage of concrete
- c)To resist shear cracks at the bottom of the beam
- d)To resist principal tension
Correct answer is option 'D'. Can you explain this answer?
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Minimum shear reinforcement in beams is provided in the form of stirru...
Explanation
Minimum shear reinforcement in beams is provided to ensure the following:
- To prevent sudden failure of the beam due to loss of bond between steel and concrete due to bursting of concrete cover.
- To prevent brittle shear failure due to diagonal principal tension.
- To prevent cracks due to shrinkage of concrete and thermal stresses.
- To hold the main reinforcement and increases the confinement.
Out of the above given, the most critical is diagonal principal tension.
Most Upvoted Answer
Minimum shear reinforcement in beams is provided in the form of stirru...
Minimum shear reinforcement in beams is provided in the form of stirrups to resist shear cracks at the bottom of the beam.
Explanation:
Shear reinforcement is provided in beams to enhance their shear capacity and prevent shear failure. Stirrups are commonly used as shear reinforcement in beams. The minimum shear reinforcement, in the form of stirrups, is provided to resist shear cracks at the bottom of the beam.
Shear Cracks in Beams:
Shear cracks occur in beams when the shear stress exceeds the shear strength of the concrete. These cracks typically form diagonally along the beam's span, starting from the bottom surface and progressing towards the top surface.
Importance of Shear Reinforcement:
Shear reinforcement, such as stirrups, helps to control and limit the width and propagation of shear cracks by providing additional resistance against shear forces. This reinforcement prevents the shear cracks from widening and extending through the beam's cross-section, thereby improving the overall structural integrity.
Role of Stirrups:
Stirrups are typically placed perpendicular to the longitudinal reinforcement in a beam. They are designed to carry the shear forces and transfer them to the adjacent concrete. The main function of stirrups is to confine the concrete and prevent it from shearing along a potential failure plane.
Minimum Shear Reinforcement:
The minimum shear reinforcement, in the form of stirrups, is determined based on the shear capacity requirements of the beam. It is provided to ensure that the shear cracks do not exceed the acceptable limits and compromise the structural stability.
By providing the minimum required shear reinforcement, the beam's shear capacity is increased, and the potential for shear failures and extensive shear cracks is reduced. This ensures the safety and durability of the beam under various loading conditions.
Therefore, the correct answer is option 'D' - To resist shear cracks at the bottom of the beam.
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Minimum shear reinforcement in beams is provided in the form of stirrups-a)To resist extra shear force due to live loadb)To resist extra shear of shrinkage of concretec)To resist shear cracks at the bottom of the beamd)To resist principal tensionCorrect answer is option 'D'. Can you explain this answer?
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