Reinforcement detailing of Columns from ETABS output

Aim and introduction:

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.

Procedure:

Steps:

• Go to the Etab software
• Select the G+4 model

• Analyse the model
• Check the model

• Select Display the design information in that longitudinal reinforcing

• Shear reinforcing

For Grid 3A:

Longitudinal reinforcement

• Maximum Ast @ the base to ground =7027mm^2
• Maximum Ast from ground to the terrace=6926mm^2

Hence we provide #10 no.s 32mm dia from the base to ground

Hence we provide #8 nos of 32mm dia from the ground to the terrace

Shear reinforcement

• Minimum shear bar 4.99=499mm^2
• Shear bar calculation=1000/200Xarea of a barX legs=1000/200X50.26X2=502.6mm^2

For Grid 3B:

Longitudinal reinforcement

• Maximum Ast from base to the terrace=5046mm^2

Hence we provide #8no.s of 28mm dia bars from the base to terrace #6no.s of 28mm dia bars

Shear reinforcement

• Minimum shear bar 4.99=499mm^2
• Shear bar calculation=1000/200Xarea of a barX legs=1000/200X50.26X2=502.6mm^2
• 

Results:

Run the analysis and design the RCC Moment Resisting Frame.

1. 3A
2. 3B

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