Reinforcement detailing of Columns from ETABS output

PROCEDURE:-

• Open the challenge 7 attachment which are provided to us
• After downloading open the Challenge open it in the ETABS 20 software
• Select the 3A and 3B columns from all stories as shown in below;
• Change the view into Elevation view - 3
• And Run the Analysis
• Now we have to start the column design by selecting the "concrete frame design" an below showing;
• Below showing longitudinal reinforcement of the columns 3A and 3B after run the analysis
• Now we are separately showing longitudinal reinforcement and shear reinforcement of the columns
• Longitudinal reinforcement and shear reinforcement and Diagrammatical details of the column at grid 3A from ETABS;

1. Longitudinal reinforcement:-
2. Shear reinforcement:-

NOW WE HAVE TO PROVIDE DETAIL REINFORCEMENT TO THE COLUMN;

1. For GRID INTERSECTION 3A -

From Base to first floor the maximum Ast is = 7027 mm²

So we can provide 8 no's of 32 mm diameter bar = 8 x 803.84

= 6430.72 mm²

also we can provide 2 no's of 20 mm diameter bar = 2 * 314

= 628 mm²

8 no's of 32 mm+2 no's of 20 mm = 6430.72+628

=7058.72 mm2>7027 mm²

........hence okay

Diagrammatical Details of column at grid 3A are shown below -

2) For GRID INTERSECTION 3B -

From Base to Terrace floor the maximum Ast = 5046 mm²

So , Provide 8 bars of 25 mm diameter for the column = 8 x 490.87*8

= 3927mm²

Provide 2 bars of 32 mm diameter for the column = 4 x 314.16

= 1607.68mm²

Therefore;

Provide 8 bars of 25 mm diameter for the column + Provide 4 bars of 20 mm diameter for the column =

= 3927 + 1607.68

= 5534 mm²>5046 ...........hence okay

Diagrammatical Details of 3B Grid are shown below ;

• Now ,Typical Beam column Joint as per special confining reinforcement provision of clause 8.1 of IS 13920 -2016
• As per IS 13920 - 2016 at beam column junction:-
• For beam - The spacing from the face of the beam should not be more than 100 mm till 2d
• For Column - The spacing from the face of the column will be lo and should not be more than Least lateral dimension,(1/6^th) of clear span or 450 mm

RESULT:-

• The given ETABS model has been analysed after checking the model.
• Then concrete frame design has also been carried out hence the reinforcement area required has been obtained.
• The longitudinal reinforcement details obtained from the results have been drafted in AutoCAD software.
• Similarly the shear reinforcement detail also have been drafted.