Structural Modelling using Etabs 2018
AIM: To run a model response spectrum analysis and check analysis results of the ETABS model for the inter story drift requirements ,vertical and planner irregularities ,minimum shear wall requirements ,amximum axial load ratio for column and shear walls ,an effective moment of inertial for beams
PROCEDURE:
- Now select the edit grid
- Now set the grid as shown
- Now set the story as required
- Now we get the grid as shown below
- Now define the material properties as shown below
- Now we add material type as concrete and grade M 25
- Now we add material type as Rebar and grade as HYSD 500
- Now add material type rebar and grade as HYSD 415
- Now define the section property for column ,beam and wall for t his ,go to define tab--->section property ---->frame section ----->Beam 300 X 450 and column 400 X 600
- For Design Column
- Now define slab properties ------> Define---->slab section
- Slab 150
- Slab 125
- Now Define wall properties ---->Wall 250
- Hence defined materiual as well as section properties ,so now we need to place the components in the suitable position
- Place column at suitable position
- Go to quick draw column and place the column at suitable positions
- Similarly place the beam (C450 X600) and shear wall at suitable locations without obstructing the parking area
- Next, we need to provide loads before carrying out the analysis
- Defiine --->load pattern and assign load case
- Brickwall load assigned as 3.5 Kn/m
- Floor Finishes - 1.5 Kn/m^2
- Live load -2Kn/m^2 and 5kn/m^2 for terrace as it contains mumty and lift unit
- Also provide the live load reduction factor as per IS 875 part II Design --->Live load reduction factor
- Click on load pattern and define seismic load
- Define mass source
- Now define the pier label
- Now define the modal cases
- Click on the analuyze and then click on load cases to run and calculate diaphragms centre of rigidity
- Now click on the analyze and check the model
- Now go to analyze and check the design
- Select the dsiplay and click on the show table
- Base shear check ad scaling
- Check for inter story drift
- As per codal provision IS 1893:2016 it does not exceed 0.004
- Hence analysis has been done succesfully