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

Objectives of the Challenge:

• To extract values of longitudinal steel ratio, boundary element length and shear reinforcing ratio from the design results.
• To provide a cross-sectional steel arrangement of the shear wall from its base up to the 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.
• To provide elevation drawings of the reinforcement details of the shear wall from the base up to the terrace.

Procedure:

• Import the model of the G+6 building into ETABS.
• Go to elevation 11 to design the A11 shear wall.
• No run the analysis for the entire model.
• Click on 'Shear wall design' to design the reinforcement area of the shear wall.
• Check each value of the area of reinforcement in the shear wall:
  • Longitudinal reinforcement or vertical reinforcement:
    
  • Shear reinforcement or horizontal reinforcement:
    
  • Boundary zone width:
    
• Storey assignment table to refer to Elevation of Shear wall:
  

Detailing guidelines for the Shear wall:

Whichever is greater from the following, Should be drawn in RC shear wall detailing

1. Minimum reinforcement for shrinkage & temperature
2. Ultimate limit state design rebar requirement
3. Ductility rebar requirement

• Classification of the shear wall as per IS-13920-2016 clause 10.1.4 Slender wall
     hw/Lw=21000/1500=14>2
• Minimum net vertical reinforcement as per IS-13920-2016 Table-1 (iii) 2363 mm2
     = 0.0025 + 0.01375 (300/1500)
• Minimum vertical reinforcement within boundary element Table-1 (iii)
     1440 mm2 on left (600mm width boundary element
     1080 mm2 on right (450mm width boundary element

Detailed AutoCAD Sketches of Reinforcement in Shear wall A11: