Reinforcement detailing of Columns from ETABS output

Aim:

To Provide Reinforcement detailing of columns with the help of Etabs.

The ETABS file for a G+4 building is provided. Run the analysis and design the RCC Moment Resisting Frame. The following challenge deals specifically with two columns at the following grid intersections.

1. 3A
2. 3B

Procedure:

Open the given model in the etabs, set the mde on all storeys.

Select the designated column, 3A and 3B.

Right click on the screen > select the show selected frame option.

The 2 column frame from the base to the top floor.

Analyze the model.

Click on the concrete frame buttom, so the reinforcement details will be appearing.

Change the reinforcement details into shear reinforcement.

Go to the drop button on the concrete symbol > select the display design info > change the longitudinal reinforcement to shear reinforcement.

as per the code IS13920 clause 8.1 :

Io should not be less than :

larger column dimension.

1/6th of clear span of column.

450mm.

From the value from the etabs and considering the code we assume the Io value as 650.

Confinement spacing not more than:

1/4th of short column dimension.

6x the dia of column's main rod.

so considering the values from the etabs and according to the code we assume the confinement spacing 100mm

amount of confienment bar is calculated by the expression from the code IS 13920 clause 8.1.

from this expression we get the greater value of 169mm^2.

The same proceedure has to be followed for the longitudinal reinforcement but the confinement spacing expression is different.

Greater result of these two values is considered.

The shear reinforcement details of 3A is sketched and attached at the below:

RESULT AND REPORT:

The reinforcement details of the given columns has been analysed and detailed as per the details from the etabs and the IS 13920.