Details Of Shear Reinforcement in R.C.C. Structures

Shear reinforcements are made to withstand shear or diagonal stress. Shear reinforcement is commonly provided in the form of stirrups to keep the longitudinal reinforcement in place while also taking the shear that the structure is subjected to.

The three forms of shear reinforcement employed are as follows: Stirrups that are vertical, bars that have been bent up with stirrups, stirrups that are inclined.

Stirrups that are vertical

These are the horizontal steel bars that are spaced evenly around the tensile reinforcement along the length of the beam. The diameter varies between 6 and 16 millimeters.

The stirrups' free ends are attached to the anchor bars, hanger bars, or compressive reinforcement at the compression area of the beam.

Because the sheer pressure at the supports is highest, the stirrup spacing at the supports is smaller than the spacing towards the midspan.

The stirrups' free ends are attached to the anchor bars (hanger bar) or the compressive reinforcement in the compression zone of the beam.

To get rid of diagonal cracks more effectively, narrowly spanning stirrups are recommended. Because the shear stress at the supports remains extreme, the distance of stirrups near to the supports is less related to the distance close to the mid-span.

Vertical stirrups come in a variety of styles

·         Single Legged Stirrup

·         Two-Legged Stirrup

·         Four-Legged Stirrup

·         Six-Legged Stirrup.

Bent Up Bars along with Stirrups

Many longitudinal bars in a beam may be bent near the supports where they are not required to withstand the bending moment. Bending Time differs significantly more from the supports. The diagonal stress can be tolerated by such bent-up bars. To maintain balance, the same number of bars will be twisted on all sides.

At more than one level, the bars can be bent equally across the length of the beam. The diagonal stress is not a problem with such bent bars. Typically, these bars are bent at a 45-degree angle. This gadget is used with higher shear forces. Applying bent-up bars and vertical stirrups to the input determines the beam's overall shear resistance. Bent up bars make for around half of the total shear reinforcement.

Stirrups that are inclined

Stirrups that are inclined at 45 degrees to prevent diagonal tension are also often available. These are available for the duration of the beam.

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