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

Objective of this challenge is:

a) Know the concepts and reinforcement detailing of shear wall.

b) Ductility detailing required as per IS13920-2016.

c) Know how to extract values of longitudinal steel, boundry elements from the design results and use them to prepare the reinforcement detailing.

Procedure:

1) First Open the given attachment file in Etabs and than Select the Shear Wall at Grid A-11 in the structural Model.

2) Right Click and go to the Show selected objects only, this will the selected shear wall only.

3) Go the elevation option and select the Grid 11 and also check whether pier analysis has been done or not.

4) Now run the analysis from the analysis icon, after the analysis has completed click on the shear wall design icon.

5) Now check for the design info. from the display design parameters. like longitudinal reinforcement, shear reinforcement, and boundry zone width.

6) Also check the respective floor heights from the modify storey data option.

7) After that using the value of the design info we can draft the shear wall reinforcement detailing in Autocad and following the provisions of IS 13920-2016.

Reinforcement Detailing Requirement: IS13920-2016.

a) Min. reinf. for shrinkage and temperature

b) Ultimate limit state design rebar requirement.

c) Ductility requirement.

Out of this which ever is greater should be drawn in RCC Shear wall detailing.

1) Here it is a slender wall since h/l is greater than 2.

2) Min Vertical reinf. required is 2363mmsq.

3) Min vertical reinf. within boundry elements 1440sqm on left and 1080sqmm on right.

d) Max dia of bar of shear wall 1/10 of the wall thickness.

Confining Reinf.:

a) 1/3 of min. member dimensions 300/3=100mm.

b) 6 times of the main rebar=6x25mm=150mm.(Here main bar is 25mm)

c) 150mm is permissible if vertical bars are placed at 200mm.

d) Calculating Ash we get Ash= 452 sqmm.(Sv=150, h=1000)

Detail Drawing for Shear Wall: