Reinforcement detailing of Columns from ETABS output

Reinforcement detailing of columns in Etabs 2018.

Question :- 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

• Provide details of longitudinal reinforcement for the two columns, from foundation to terrace level. Sketch the column cross sectional & elevation details or draft it using autocad software. 
• Show shear reinforcement & lapping details as per special confining reinforcement provision of clause 8.1 of IS 13920 - 2016. 

Answer :- 

AIM :-

• In the given E- Tabs 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

INTRODUCTION :-

• In the modal we provide the details of longitudinal reinforcement of two columns and shown shear reinforcement, lapping details as per special confining zone of clause 8.1 of IS 1920-21016

PROCEDURE :-

STEP 1) Open the Given Model

• Model open in etabs software
• Check the model

        

          

STEP 2) Column Analysis

• Select the column intersection 3A & 3B from terrace to foundation
• Click on run analysis it will show the max. & min. deflection at the bottom

            

              

STEP 3) Reinforcement Detail

• Click on concrete frame design icon
• It will show the longitudinal reinforcement of the column
• Select the elevation view along the grid 3
• Drop down the icon concrete frame design and click on display design info
• Select shear reinforcement in display concrete frame design

                 

                     

           

                 

                 

STEP 4) Reinforcement Design

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

               

                 

Storey Elevation of column :-

             

Special confining reinforcement from IS-13920-2016(Clause 8.1) :-

                

Lo not less than :-

1. Larger column dimension
2. 1/6 of clear span of column
3. 450 mm

Confinement spacing not more than :-

1. ¼ of smaller column dimension           
2. 6 times of dia of column main bar 
3. 100 mm

The amount of confinement rebar :-

          

Ash = 169 mm^2

                          

                       

• Typical column reinforcement section and elevation for grid 3A & 3B
• Provide some additional confining reinforcement 8mm @100mm C/C
• Used 8mm dia stirrups at 200mm spacing in center
• Used 2 closed stirrups (2legged) and 1 open link (stirrups)

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