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The codal provision recommends minimum shear reinforcement in the form of stirrups in the beam
1. To cater for any torsion in the beam section
2. To improve the ductility of the cross-section
3. To improve dowel action of longitudinal tension bar.
Select the correct answer using the codes given below :
- a)1, 2 and 3
- b)2 and 3
- c)only 1
- d)only 2
Correct answer is option 'B'. Can you explain this answer?
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The codal provision recommends minimum shear reinforcement in the for...
The provisional of nominal web reinforcement restrains the growth of inclined shear cracks, improves the dowel action of the longitudinal tension bars, introduces ductility in shear and provides a warning of the impending failure.
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Hence, the correct option is (B)
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The codal provision recommends minimum shear reinforcement in the for...
The correct answer is option 'B', which means that the minimum shear reinforcement in the form of stirrups in the beam is recommended to improve the ductility of the cross-section and to improve the dowel action of the longitudinal tension bar.
To understand this answer in detail, let's look at each option and its significance:
1. To cater for any torsion in the beam section:
Torsion refers to the twisting of a structural member under the action of applied loads. When a beam is subjected to torsion, it experiences shear stresses along its length. These shear stresses can cause the beam to fail in shear, leading to a reduced load-carrying capacity and potential structural failure. By providing minimum shear reinforcement in the form of stirrups, the beam's resistance to torsion is enhanced, ensuring its stability and preventing failure.
2. To improve the ductility of the cross-section:
Ductility refers to the ability of a material or structure to deform plastically without fracturing. In the case of a beam, ductility is crucial to withstand sudden and large deformations caused by loads or external factors such as earthquakes. By adding shear reinforcement in the form of stirrups, the beam's ductility is improved. Stirrups help to confine the concrete in the compression zone, preventing it from spalling or disintegrating during excessive deformations. This enhances the overall strength and resilience of the beam, making it more ductile.
3. To improve dowel action of the longitudinal tension bar:
In a reinforced concrete beam, longitudinal tension bars (rebars) are used to resist tensile forces. These tension bars are typically anchored into the beam's support or embedded into the adjacent concrete members. The dowel action refers to the transfer of forces between the rebars and the surrounding concrete. By providing shear reinforcement in the form of stirrups, the dowel action of the longitudinal tension bars is improved. Stirrups help to confine and interlock the tension bars, ensuring a better transfer of forces and preventing the bars from slipping or pulling out under load.
In summary, the provision of minimum shear reinforcement in the form of stirrups in a beam is recommended for several reasons. It helps to cater for any torsion in the beam section, improves the ductility of the cross-section, and enhances the dowel action of the longitudinal tension bars. These measures are essential for ensuring the structural integrity, strength, and safety of the beam.
To understand this answer in detail, let's look at each option and its significance:
1. To cater for any torsion in the beam section:
Torsion refers to the twisting of a structural member under the action of applied loads. When a beam is subjected to torsion, it experiences shear stresses along its length. These shear stresses can cause the beam to fail in shear, leading to a reduced load-carrying capacity and potential structural failure. By providing minimum shear reinforcement in the form of stirrups, the beam's resistance to torsion is enhanced, ensuring its stability and preventing failure.
2. To improve the ductility of the cross-section:
Ductility refers to the ability of a material or structure to deform plastically without fracturing. In the case of a beam, ductility is crucial to withstand sudden and large deformations caused by loads or external factors such as earthquakes. By adding shear reinforcement in the form of stirrups, the beam's ductility is improved. Stirrups help to confine the concrete in the compression zone, preventing it from spalling or disintegrating during excessive deformations. This enhances the overall strength and resilience of the beam, making it more ductile.
3. To improve dowel action of the longitudinal tension bar:
In a reinforced concrete beam, longitudinal tension bars (rebars) are used to resist tensile forces. These tension bars are typically anchored into the beam's support or embedded into the adjacent concrete members. The dowel action refers to the transfer of forces between the rebars and the surrounding concrete. By providing shear reinforcement in the form of stirrups, the dowel action of the longitudinal tension bars is improved. Stirrups help to confine and interlock the tension bars, ensuring a better transfer of forces and preventing the bars from slipping or pulling out under load.
In summary, the provision of minimum shear reinforcement in the form of stirrups in a beam is recommended for several reasons. It helps to cater for any torsion in the beam section, improves the ductility of the cross-section, and enhances the dowel action of the longitudinal tension bars. These measures are essential for ensuring the structural integrity, strength, and safety of the beam.
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The codal provision recommends minimum shear reinforcement in the form of stirrups in the beam1. To cater for any torsion in the beam section2. To improve the ductility of the cross-section3. To improve dowel action of longitudinal tension bar.Select the correct answer using the codes given below :a)1, 2 and 3b)2 and 3c)only 1d)only 2Correct answer is option 'B'. Can you explain this answer?
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