Analysis & Design of RCC shear walls in the model using ETABS

The etabs file for a G+6 building is provided. Run the analysis and design the RCC shear walls (show in the etabs model). The following challenge deals specifically with the shear wall of size 300x1500 at grid A-11 in the structural model.

• Extract values of longitudinal steel ratio, boundary element length and shear reinforcing ratio from the design results.
• Provide cross sectional steel arrangement of the shear wall from its base up to terrace, in compliance with provisions of IS 13920 – 2016. AutoCAD application can be used for this exercise. Alternatively, it can be drawn by hand as well.
• Provide elevation drawings of the reinforcement details of the shear wall from base up to terrace.

AIM: Detailing of shear wall and to provide cross sectional steel arrangement of the shear wall from its base up to terrace, in compliance with provisions of IS 13920 – 2016

Procedure:

Step 1: The provided ETABS model is analysed and the shear wall design is run as shown in the figure below.

Step 2: The mentioned shear wall is labelled as P1. The design results of pier P1 is extracted as shown below.

From the obtained results, it can be seen that a boundary zone of 450mm is required each side. When the boundary element length is removed only 600mm of the web portion is left. Thus the entire wall is provided with confinement reinforcement.

The maximum reinforcement at ground floor is 2.62. Thus Area of longitudinal steel will come upto 11790 sq-mm.

Considering 150mm spacing between longitudinal reinforcement, 11 bars can be provided on each face and one bar each extra at the shorter direction of the wall as shown below. The the reinforcement of the wall at ground floor comes is as shown below.

Thus the reinforcement for the above floors is as shown below.

Result :

Elevation drawings of the reinforcement details of the shear wall from base up to terrace provided and also cross sectional steel arrangement of the shear wall from its base up to terrace, in compliance with provisions of IS 13920 – 2016 provided