Challenge

Reinforcement detailing of Columns from ETABS output

Aim: -

un the analysis and design the RCC Moment Resisting Frame of the Given E Tabs file and to Provide details of Longitudinal Reinforcement for the two Columns 3A & 3B for Foundational Level to terrace Level.
Sketch the column cross sectional & elevation details or draft it using auto Cad software.
Show shear reinforcement & lapping details as per special confining reinforcement provision of clause 8.1 of IS 13920 - 2016.

Introduction: -

The Reinforcement Detailing of Columns Consist of Carrying out the Design of two Columns, 3A & 3B for Longitudinal and Shear Reinforcement.
For Design purpose the Columns are separated into two Categories Short Columns and long Columns
A Short Columns is a Structural Member whose relatively short length Virtually ensures it Will Fall in Compression if it is Evenly Loaded along its axis.
Columns Can be as short, Intermediate or long depending on their Lengths, their Material properties and the Lengths of other Columns in the Same Structure
Slender Column can be tested in Laboratory to observe the action of buckling or crimpling for Column based on Slenderness Ration it s termed as long or sort column
Longitudinal Reinforcement Columns
Circular Columns should have a Minimum 6 Bars
Rectangular Columns must have a Minimum of 8 bars
As per IS 456-2000 the Minimum C/s area of Longitudinal Steel is 0.8% Gross Cross sectional Area of Columns
Bars Should not be Less then 122mm in Dia

Procedure: -

Open the Etabs File
Check out the Model
Carry out the Analysis Model
Once analysis Complete next we have to carry out the design
For this initially go to Concrete Frame Design in the Etabs provided at the top
Concrete Frame Design>> Design Preference
Concrete Frame Design Combinations
Concrete Frame Design >> Start Design Check
Concrete Frame Design>> Display Design Info >> Longitudinal Reinforcement
Concrete Frame Design>> Display Design Info >> Longitudinal Reinforcement
Now We need to draft the Column Reinforcement Details on an Auto Cad
The Reinforcement Details for the Column 3A is Given Us
Here the Maximum Longitudinal Reinforcement Required is 7027 mm^2
Hence Provided 8 Nos of 32mm Día Bars and 2 Nos. of 20mm Día Bars which together Contributes AST of 7060 mm^2
Now for shear Reinforcement the maximum Reinforcement Area required is 720 mm^2
Hence Provided 10 mm Día bars @ 150mm C/C a Zone A AND A Spacing of 100 mm C/c a zone B which Contributes to an Ast of 1570mm^2 and 2355 mm^2 Resp.
The Reinforcement Details for the Column 3B is Given Us
Here the Maximum Longitudinal Reinforcement Required is 5046+mm^2
Hence Provided 4 Nos of 32mm Día Bars and 6 Nos. of 20mm Día Bars which together Contributes AST of 5100 mm^2
Now for shear Reinforcement the maximum Reinforcement Area required is 720 mm^2
Hence Provided 10 mm Día bars @ 150mm C/C a Zone A AND A Spacing of 100 mm C/c a zone B which Contributes to an Ast of 1570mm^2 and 2355 mm^2 Resp.

Result:-

The Given Etabs Model has been analysed after checking the model
The Concrete Frame Design has also been Carried out hence the Reinforcement area required has obtained
The Longitudinal reinforcement Details Obtained from the results have been Drafted in Auto Cad 3
Similarly the Shear Reinforcement Details also have been Drafted

Ship work like this
in your own course.