Uploaded by TRISHA ALTHEA EUGENIO

Step by Step Procedure - For Modeling and Design of G+4 Building in ETABS

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Building Plan Grid system and storey Data Definitions will be displayed after selecting ‘No’
button.
Set the grid line and spacing between two grid lines. Set the storey height
data using Edit storey Data command.
Note: You can change Grid spacing by choosing Custom Grid spacing, for
column varying spacing then click Edit Grid you can also change any storey
height by choosing Custom Storey Data, then click on Edit Storey Data.
Go to Main menu  Edit Storey data  Edit Storey.
STEP 3: (Define Material Properties)
From Main menu  Define  Material Property  Add new material 
Material Name =M30
Concrete cubic comp. strength fck =30
Bending Reinforcement yield strength fy =415
Shear Reinforcement yield strength fy =415  Ok  Ok.
STEP 4: (Define Frame section)
Define Column:
From Main menu  Define  Frame section  Add rectangular  Material
name =M30 (select)  section Name =C600x300M30
Dimensions :
Depth (3) = 600mm
Width (2) =300mm
Bar size =25 d
Corner bar =25 d
 Reinforcement to be designed  Ok Ok.
Define Beam:
From Main menu  Define  Frame section  Add rectangular  Material
name =M30 (select)  Section Name=B230x700M30
Dimensions:
Depth (3) =700mm
Width (2) =300mm
Select  Beam 
Define Slab:
From Main menu  define  Wall/Slab /Deck section  Add New slab 
Section name = S1
Material name = M30.
 Membrane
Membrane =125 mm
Bending =125mm
Select  Membrane  Ok  Ok.
STEP 5: (Drawing Columns, Beams, and Slabs)
Drawing Columns:
From Main menu  Draw  Draw line objects  Create column in region 
Property = C600x300M30 
Select or Click on the column joints in Plan view (Left window) with ‘similar
storey’ option. If necessary change angle =90  Change Property
corresponding to column designation and click on respective column joints
 Close.
Drawing Slab:
From Main menu  Draw  Draw area objects  Create areas at click (Draw
areas) (Plan)  Property =S1  Click on the periphery of column joints and
press enter (With similar storey option).
STEP 6:(Assigning Support Condition)
Set Base floor Plan view in left window  Set Column points (with mouse)
From Main menu  Assign  Joint/Point  Restraints (supports)  Select
Fixed  Ok.
To view Support assigned
From top Tool bar  Set Building view option 
Visible in view
 Supports  Ok.
Go to Elevation view 1 and view . For other views click   arrow at top of
tool bar.
STEP 7: (Defining Loads)
1.Gravity Loads (Dead Load & Live Load)
From Main menu  Define  Static Load Cases 
Load = SIDL (Super Imposed Dead Load)
Type = Dead
Self weight multiplier =0  Add New Load  Ok.
Load = Wall
Type= Dead
Self weight multiplier =0  Add New Load  Ok.
Note:
For Self weight multiplier will be 1 for beams and columns of dead load. For
all other loads, it will be zero.
Assigning the Loads:
Activate left window and set to Plan view  Activate or select similar storey
option (at bottom) and select all slabs
 From Main menu  Assign 
Shell / Area loads  Uniform 
Load case name =SIDL
 Uniform load
Load = 1.50 Kn/m2 (units Kn.m)
Direction Gravity  Ok.
In the same manner assign Load case name = Live
 Uniform load
Load = 2.0 Kn/m2 (units Kn.m)
Direction : Gravity  Ok.
Assigning Wall loads:
9” wall load = 11.176Kn/m (First to fourth floor)
Ground floor =14.224Kn/m.
Terrace floor=4.508Kn/m.
In left side window select the beams in first to fourth floor by setting
similar storey options and view the status bar to know no. of beams selected

From Main menu  Assign  Frame /Line loads 
Distributed Load case name = wall.
Unit Kn.m
 Forces
Direction Gravity
Uniform load=11.176 Kn/m
 Replace existing loads  Ok.
In the same manner apply Ground floor and terrace floor wall loads by
setting “single storey option” and assign the wall loads.
To see the load assigned :
Right click the particular member corresponding load  Ok.
Note:
For point load :
From Main menu  Assign  Joint/Point loads 
Load case name =Dead.
Units Kn.m.
 Replace existing loads
Forces Global =10 Kn  Ok.
2. Wind Loads :
In ETABS there are two ways to define lateral loads (Wind, earth quake).
Built in option will automatically calculate lateral loads as per available
design codes.
Define wind load parameters as per IS 875 --Part 3 (1987)
From Main menu  Define  Static Load cases 
Load = X or Y
Type = Wind
Self weight multiplier =0
Auto Lateral load =IS 875—1987   Add New Load  Select wind X
load and click on modify lateral loads to specify required wind load
parameter. As per IS 875  Ok  Ok.
Creating dummy areas with property =None
Set required elevation view in right window  From Main menu  Draw
 Draw area objects  Draw rectangular areas  Property = None 
Click on the perimeter of area and press enter.
Foot Note: Apply wind load for selections.
To select wind area
Main menu  Select  By area object type  select none  Ok.
Assigning wind loads
Select drawing area of required elevation  From Main menu 
Assign  Shell/area loads  Wind Pressure coefficients 
Wind load case name =Wind X
Coefficient Cp= - (Change if required)  Ok.
To see wind load selection
 Set Building view option 
 Area section
 Line section  Ok.
3.Earthquake Analysis
In building, slab is considered as single rigid member during earthquake
analysis.
Select left side window.
Select all slabs by setting all floors/ similar storey option  From Main menu
 Define  Diaphragms  Select D1  Modify/ Show diaphragms 
Select  Rigid  Ok  Ok.
Define Mass Source
As per IS 1893-->2002 25% of Live load is considered on all floors of
building.
From Main menu  Define  Mass source  select  From Loads 
Load =Dead; Multiplier -->1.0  Add
Load = Live; Multiplier =0.25  Add
Load =SIDL; Multiplier =1.0  Add
Load = Wall; Multiplier =1.0  Add  Ok.
Define Earthquake Load (Static Method)
From Main menu  Define  Static Load cases 
Load =EQX
Type = Quake
Default Multiplier =0
Auto Lateral load = IS 1893—2002  
Add New Load  Select the load EQX  Modify lateral load  If required
change values as per IS 1893  Select  X Direction
Select  Program calc
 per code =0.36 (change as per requirement)  Ok
 Ok.
Assigning Diaphragms
Set all storey option and select all slabs  From Main menu  Assign 
Shell area  Diaphragms  D1  Ok.
To view the Diaphragm
Go to  Set Building View objects
 Diaphragm
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