TUTORIALS

For What Reason Bars are Bent in Slabs nearby at support

Does the major reinforcements inclined at an appropriate angle to serve like shear reinforcements? Furthermore, reinforcements are turned-up/bent up toward the columns/edges wherein higher compressive force takes place.

Bars are bent nearby at support in order to:

• To oppose shear force.
• In order to oppose [NBM] nearby at supports.
• In order to increase the robustness of RCC within the slab.
• Furthermore, bent Up bar may reduce the quantity of steel.
• Moreover, bent up bars within the slab is fairly robust as compared to normal slab.
• Also, bent up bars suitably boosts the distortion potential of slabs in comparison to hose not with bars inclined.

• Through expanding bars up till supports, one could even decrease the possibility of brittle failure because of greater compressive stresses resulting in the structure to disintegrate.

Furthermore, there are 2 arrangements to twist the bars - Double lattice system as well as Single lattice system.

Moreover, bent up bars (a sort) is at all times presented with inclined or vertical stirrups.

Also, bent up bars is utilized for the saving of objects. Generally, with regard to set ended Slabs, positive moments are there on the mid-length as well as negative moments on the supports.

The cutting length of bent up bar will be calculated with the following formula:

= Clear span + (2 x 0.42 H) + (2 x Ld) – (1d x no. of bend) – (2d x no. of bend)

Remarks: Bent Bars are offered on the supports’ top part.

In accordance with the IS code, the bend up bars must not be set to obtain in excess of fifty % shear force that is The bent up bars could be set to an utmost of fifty % of shear force as well as the additional must be led by/taken by the sheer stirrups whether vertical or inclined stirrups.

Read: Bar Bending Schedule for Slab, Estimation of Steel Reinforcement in Slab

To get more clear ideas, go through the following video tutorial.

Lecturer: Civil Engineer Deepak Kumar