Modelling of 25 storey building with the specified properties using ETABS

• Aim:

To model a 25-storey building using ETABS software and verify the seismic code requirement from ETABS analysis.

Procedure:

• Open ETABS software.
• Click New model.
• Give model initialization setting as follow
• Click ok
• In the new model quick template dialog box , select custom grid spacing and click Edit grid data
• Give the following settings in grid system data dialog box.
• Click ok.
• Select custom story data under story dimension and click edit story data.
• Give the story data for first- three story as follow having story 1 as master story.
• Write click on the first column and select add story and click keep existing story heights.
• Give number of added story as 22
• Click ok
• The following page opens
• Click Define--> Material properties
• Click Add new material for assigning concrete
• .
• Click Add new material for assigning Rebars
• Click ok
• Click Define--> Section properties--> Frame sections.
• Select Add new property in the dialog box.
• Select the concrete shape as rectangular and give the following settings for the Beam
• Beam property is added.
• Again, click Add new property for creating property for column.
• Column property is added.
• Click--> Section properties--> Slab section
• Select Add new property and give the following settings.
• Clickà Define--> Load pattern
• Define load patterns by its name
• Click Define--> Mass source
• Check load cases by click Define-->Load cases.
• Create load combinations, Define--> Load combinations
• 
• Create Columns by Quick draw column.
• Select quick draw beams.
• Select the first horizontal and vertical beams and go to edit and select replicate.
• Select first floor in plan view
• Draw slab using quick slab by having similar stories in the status
• Select all the beams from select tab
• Assign frame loads as distributed from assign tab.
• Select the slabs
• Assign shell loads as uniform
• Select the slabs from select tab and assign as
• diaphragm from assign tab.
• Click run analysis in the panel after saving the file.

Result:

• Click Display -->Story response plot. Change the display type to Maximum storey drift and desired combo to see the plots.