Structural Modelling using Etabs 2018

Aim - To model and analyze the residential building using Etab

Procedure -

Step 1 -

• First open Etab software
• Select new model from file menu
• After selecting new model,new tab open and select Use Built in setting 

• Then select grid,and do the setting in grid system data

• After grid setting,Add the 7 story in the story data table

Step 2 -

• The plan view and 3D  view are  visible 

Step 3 -

• Select material properties from define menu option 
• For concrete material choose M25 grade and standard as Indian

• Add new material type as Rebar and grade as HYSD 500
• Check the material property

• Add new material property Rebar as grade HYSD 415
• And check the material property

Step 4 -

• After selecting material properties,we select section properties and choose frame section
• After selecting frame section we add new property,in that tab select Rectangular shape concrete type 
• Add beam size of B400x500,and select modify /show modifiers and modify show rebar

• In stiffness modification factor select moment of inertia about 2 axis =0.35 and moment of inertia about 3 axis =0.35

• After selecting modify/show rebar option,select design type as M3 design only 9 (beam) 
• Longitudinal bars as HYSD500 and confinement bars as HYSD 415

• Add new  section property as C450x600

• In stiffness modification factor select moment of inertia about 2 axis =0.7 and moment of inertia about 3 axis =0.7

• After selecting modify/show rebar option,select design type as P-M2-M3 design (column)
• Longitudinal bars as HYSD500 and confinement bars as HYSD 415

• Again add section property as C400x400

• Now select slab section property from the section option
• Select modify/show property 
• Put the slab property as Slab150mm thickness and then ok

• Now for staircase,again add slab property as slab200 mm thickness

• Now add wall property as Wall 300mm

Step 5 -

• Next we add column using quick draw column option 
• After that,we add beam using quick draw beam option

Step 6 -

• Draw secondary beam using quick draw beam option

Step 7 -

• Now draw shear wall in plan view using draw wall option

Step 8 -

• Add slabs using quick draw floor/wall option 

Step 9 -

• Now select base plan,and select all joints and then restraints from join option
• Select pinned support and then apply and ok

Step 10 -

• Now add load pattern from the define option

• Add dead load,live load,brickwall load and earthquake load 

Step 11 -

• Next add distributed load  from frame load,in that select brickwall as load pattern and put uniform load value 3.5kn/m

• Select assign option and then select shell load and then uniform option
• Add live load as 3kn/m^2 for stairscase and lift

• Again add live load as 2kn/m^2 for all building 

Step 12 -

• Now select live load reduction factor from design option
• Add reduction factor by 10% decrease in live load

Step 13 -

• Select mass source from define option

• Add load pattern in mass source data 

Step 14 -

• Now select object type option from select option
• After selecting the object type option,new tab will be visible and in that,select floors and then select and close

Step 15 -

• Then select Diaphragms  form shell option
• New tab will appear,in that select D1 and click on apply and close

Step 16 -

• Next select the pier lable from the shell option
• Assign the names for shear wall as p1,p2,p3,p4,p5,p6,p7

Step 17 -

• Next select load combinations from define tab
• In that,select Add default design combo option
• After that,select concrete frame design and concrete shear wall design 

Step 18 -

• Check the model by clicking the check model option from display option
• The model is checked,and warning message is shown

Step 19 -

• Select define option,in that select function and then select response spectrum 
• After selecting new tab is visible,in that choose IS 1893-2016 form choose function type and then selec, modify/show spectrum
• After selecting modify/show spectrum option new tab will visible,in that give name as IS FUNCTION

Step 20 -

• Next select load cases from the define option
• Load case tab is visible,in that select  the Add new case 
• Add details of load case data 

Step 21 -

• Now,Run analysis

Step 22 -

• From display option select show table option
• In that,select analysis result-structure output and then base reactions and ok
• The base reaction table will appear

Step 23 -

• From display option select show table option
• In that,select analysis result-structure output and then base reactions and ok
• The base reaction table will appear

Step 24 -

• Select story response plot from the display option

Step 25 -

• Select plan view option and in that open base floor plan
• Then open reaction tab and select earthquake load
• Now base shear reaction will appear

Result -

• The G+7 residential building has been modelled and analyzed successfully.