Modelling of 25 storey building with the specified properties using ETABS

Aim: To Model and analyze a 25 storey building with the specified properties using ETABS

Procedure:

• Open ETABS 18 application
• Now model initialization tab opens
• Now select Use built-in settings with and select Indian in steel section database and select codes accordingly and click ok

• Now new tab opens
• Now select the custom grid spacing and select grid only
• Now click on Edit grid data

• Now we get a new tab as shown
• Now arrange x grid data and y grid data as required
• Now click ok

• Now select custom story data and select edit story data

• Now we get a new tab

• Now right-click on any story and we get a new tab
• Now add the number of added stories accordingly as required and click ok

• Now we the story data tab as shown below

• Now click ok we the model as shown

• Now go to define option and select material properties
• After selecting material properties we get a define material tab
• Now in define material tab select add new material properties as shown
• Now select material type as concrete and grade as M30 and click ok

• Now in define material tab select M30 and click on modify/show material
• Now we get the material property tab and click ok

• Now go to define option and select material properties
• After selecting material properties we get a define material tab
• Now in define material tab select add new material properties as shown
• Now select material type asrebar and grade as Hysd 500 and click ok

• Now in define material tab select Hysd500 and click on modify/show material
• Now we get the material property tab and click ok

• Now go to define option and select material properties
• After selecting material properties we get a define material tab
• Now in define material tab select add new material properties as shown
• Now select material type asrebar and grade as Hysd 415 and click ok

• Now go to define and section properties and select frame sections as shown

• Now we get the frame properties tab select add new property

• Now select a shape as required

• Now assign the beam size in section dimension
• Now click on Modify/show modifiers

• Now select M3 design only (beam)option
• And select longitudinal as HYSD500 and HYSD415 as confinement bars and click ok

• Follow same steps for column and give dimensions as 800x800
• Now select P-M2-M3design (COLUMN)option
• And select longitudinal as HYSD500 and HYSD415 as confinement bars and click ok

• Now go to define and select section properties and select slab sections

• Now click on add new property

• Now add name as slab 150
• Give thickness as 150 and modeling type membrane and click ok

• Now select the quick draw column

• Now select all stories as shown

• In properties of object select c800x800

• Now assign the column as shown

• Similarly, select the beam

• And assign the beams as shown

• Now select draw rectangular floor or wall and assign the floor as shown

• Now go to the base floor and select all the points
• Now go to assign and joint and select restraints

• Now we get joint assignment
• Now select x,y,z translations as shown and click ok

• Now go to define and select load patterns
• Now we get the load patterns tab
• Now add loads as shown below

• Now select Eqx and click on modify the lateral load
• Now we get a new tab select site type as III and keep x-dir on as shown
• Similarly with Eqx+, Eqx-,Eqy,Eqy+,Eqy-

• Now go to assign and select shell loads and select uniform loads

• Select load pattern as live and load as 3 till 24 floor
• Select load pattern as live and load as 1.5 for 25th floor

• Now go to select and select and object type

• Now select beams

• Now go to assign and select frame loads and distributed

• Give uniform load as 10 and load pattern as a brick wall

• Now go to define and select mass source
• Now we get mass source tab now select modify/show mass source

• Now we add load patterns in the mass source data as shown

• Now go to define and select load combination as shown

• Now in load combination tab select Add default design combos

• We select concrete framed design
• Now we can see the load combinations as shown

• Now go to select and select and object type

• Now select floors

• Now go to assign and shell and diaphragms

Now we get a shell assignment tab select D1 and ok

• Now go to analyze and select check model

• Now we get check model tab click on select all ok
• Now we get the wanings tab as shown

Now run analysis

• Now click f6 to get the deformed shapes tab
• Now you will get deformed shapes tab and Now add live load and ok

• Similarly, add dead load and Eqx and brick wall loads

• Now go to display and select show tables
• Now select modal participation mass ratios and click ok

• Now we get modal participation mass ratios table

Result:

• Modeling and analyzing a 25 storey building with the specified properties using ETABS has successfully completed