Reinforcement detailing of Columns from ETABS output

Aim:

In the given ETABS project we have to analyse and redesign the RCC moment resisting frame in two columns at the following grid intersection 3A & 3B from foundation to terrace level by using etabs with reference of IS 13920-2016

Objective:

• To identify the design of RC columns using ETABS analysis.
• To know the basics of RC column reinforcement detailing using primary analysis.
• To ensure the Ductility Reinforcement required by IS 13920-2016 being satisfied in Reinforcement Drawing.

Procedure:

1. To identify the design of RC columns using ETABS analysis.

Step 1: Open the given model.

• Open the ETABS software.
• Open the given challenge.

Step 2: Analyse the Model.

• Change the Option to All storey.

• Now select the 2 Columns on grid 3

• By right clicking Select the option Show selected options only.

• Click on the Run analysis button.

• You will see the analysis is proceeding.

2. To know the basics of RC column reinforcement detailing using primary analysis.

To proceed forward for the project follow these steps.

• Now click on concrete frame design button which will design the longitudinal reinforcement and shear reinforcement for the columns.

• Longitudinal reinforcement results are visible here.

Now we have to see the Elevation view of the following details so for this:

• Click on the elevation icon in Title Bar.
• Select the elevation view along the Grid 3.
• Click on Apply.

• Drop down the icon concrete frame design and click on display design info.

• Select shear reinforcement in display concrete frame design results dialogue box.

Longitudinal reinforcement & shear reinforcement of column at Grid-3A from ETABS (450X650).

Longitudinal reinforcement & shear reinforcement of column at Grid-3B from ETABS (450X650).

Storey Elevation of Column:

3. To ensure the Ductility Reinforcement required by IS 13920-2016 being satisfied in Reinforcement Drawing.

Lo not less than:

• Larger column dimension
• 1/6 of clear span of column
• 450 mm

Confinement spacing not more than:

• ¼ of smaller column dimension
• 6 times of dia of column main bar
• 100mm

The amount of confinement rebar:

A_sh =169mm²

Using AutoCAD we draw the Reinforcement Drawing.

RESULT:

Successfully done the designing and detailing of provided the details of column reinforcement at grid 3A & 3B from foundation to terrace level as per IS 13920:2016 clause 8.1 and sketch the cross section/ elevation in AutoCAD software