Reinforcement detailing of Columns from ETABS output

Reinforcement detailing of columns in Etabs 2018.

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.

AIM: To Providing details of longitudinal reinforcement for the two columns from foundation to terrace level.

Procedure:

Steps:

• Open the etabs
• Check the model
• Now run the analysis of the model
• Now start the design check
• Goto elevation view and select view 3

• Now Display the logitudinal reinforcement
• The display the shear reinforcement

Grid 3A

• From Base to first floor the maximum Ast is = 7027
• So we can provide 10nos of 32mm dia bar = 10 x 804
• = 8040 mm^2

• From First floor to Terrace the maximum Ast is = 4800
• So, We can provide 10 nos of 25 mm dia bar =10 x 491
• = 4910 mm^2

Grid 3B

• From Base to first floor the maximum Ast is = 5440
• So we can provide 8 nos of 32mm dia bar = 8 x 804
• = 6434 mm^2

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

Lo = 650 mm

Confinement spacing not more than-

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

Confinement Spacing = 100 mm

The amount of confinement rebar- .

Ash = 170 mm^2

Grid 3A

Grid 3B

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