Reinforcement detailing of Columns from ETABS output

AIM: Reinforcement detailing of columns in Etabs 2018.

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 the special confining reinforcement provision of clause 8.1 of IS 13920 - 2016. 

PROCEDURE:

• Given the document opened, select the 3A and 3B columns, unhide the remaining things,
• run the analysis and check the reinforcement details for both main reinforcement as well shear reinforcement,
• choose the values and check the story height to help fully of in drawing of auto cad,
• after seeing the results reinforcement required calculated manually,
• the manual calculations are drawn in the auto cad in detail,
• for both 3A and 3B main reinforcement and shear reinforcement designed.
• and the minimum area of steel used comfortably.

1. 3A Main reinforcement quantity.

1. 3A shear reinforcement quantity.

   2. 3B  Main reinforcement quantity.

2.3B Shear reinforcement quantity.

1.3A Main reinforcement and shear reinforcement detailing

1.3B Main reinforcement and shear reinforcement detailing

1. Lo not less than:-

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

it satisfy 650mm size

b. confinement spacing not moe than 

1. 1/4 of smaller column dimension
2. 6times dia. of column main bar
3. 100mm

it satisfy100mm size.

c. the amount of confinement rebar 

Ash= maxi of [0.18 sv h fck/fy(Ag/Ak -1)]

                     [ 0.05 sv h fck/fy]

it satisfy169 mm2