Reinforcement detailing of Columns from ETABS output

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

AIM:

In the given etabs 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 the longitudinal reinforcement of two columns and show shear reinforcement, and lapping details as per the special confining zone of clause 8.1 of IS 1920-21016

PROCEDURE:

STEP 1]

Open the Given Model

1. Model open in etabs software
2. Check the model

STEP 2]

Column Analysis

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

STEP 3]

Reinforcement Detail

1. Click on the concrete frame design icon
2. It will show the longitudinal reinforcement of the column
3. Select the elevation view along the grid 3
4. Drop down the icon concrete frame design and click on display design info
5. Select shear reinforcement in the 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 the clear span of the 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. 100mm

The amount of confinement rebar:-

Ash=169mm2

1. Typical column reinforcement section and elevation for grids 3A & 3B
2. Provide some additional confining reinforcement 8mm @100mm C/C
3. Used 8mm dia stirrups at 200mm spacing in the centre
4. 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 sketched the cross section/ elevation in AutoCAD software