Etabs Complete tutorial-Part-1

 

ETABS Tutorial - Beginner to Advance-Part-1
ETABS Tutorial – Beginner to Advance-Part-1

Etabs tutorial includes  a complete package of Structural analysis of Structure using IS code and NBC code  ,Starting with Following Course Content Like,Units,Section Database, Design Code selection, Grids & Define material properties accurately.

Contents:

  1. Grid and story data
  2. Defining and assigning beams
  3. Defining and assigning columns

and dividing the frame line

  1. Defining and assigning slabs

– Dividing the selected shells

– Defining slabs between irregular frames

– Assigning staircase

– Offset option for line elements

– Assigning cantilever slab

-Mirror option for elements

-Chamfer slab corners

  1. Adding and replicating a new story

– Selecting the single story elements

– Visibility options for story elements

– Reassigning the section property

  1. Defining and assigning retaining wall

– Assigning opening between frames

  1. Model view options

– Extrude option for frames and shells

– 3-D model rendering

Building Design Stepwise

  • Example: Analysis & design a following Building (plan) Using per IS –codes using ETABS Software.

No. of storey: 4 storey: 3 m ht up to 3rd floor & 2.5 m ht on roof terrace For staircase covering only.

 

Length (L) A B C D E F G H I J K L M N
0 1.2 2.7 3.9 4.5 5.8 6.7 7.6 8.8 12.6 16.4 17.49 18.13 19
Width (B) 1 2 3 4 5 Grid No.
0 5.7 9 11.5 13.5 Distance

 

MODELING

Step 1:

  • Enter grid & Storey data

Step 2:

  • Defining & Assigning beams

Step 3:

  • Defining & Assigning columns
  • Orientation Change of columns (local axis)
  • Merging & Dividing the frame line

Step 4:

  • Defining & Assigning slabs
  • Dividing the select shells
  • Defining slab between irregular frame
  • Assigning staircase
  • Offset option for line elements
  • Assigning cantilever slabs ( sunshade/ Chajja)
  • Mirror option for elements
  • Chamfer slab corners

Step 5:

Adding & replicating a new storey

  • Selecting the single storey elements
  • Visibility option for storey elements
  • Reassigning the section property

Step  6:

Defining & assigning  retaining wall /Shear walls

  • Assigning opening between frames

Step 7:

Model View option

  • Extrude option for frames & shells
  • 3D model rendering

Step wise Modeling

Step:1 : Entry grid & Storey data

  • Open Etabs application on PC
  • Click File
  • New model
    (model initialization)
  • Use Built in setting with
  • Display unit : metric SI (if you need to model using feet ,inch choose us. Defult and you can change unit later if u want from here)
  • Steel Section database: Indian
  • Steel Design code : IS-800-2007
  • Concrete design code: IS-456-2000.
  • Open new model quick templates.
  • Choose Custom grid Spacing in Grid dimension (too unlink spacing height wise)
  • Choose Custom Storey data in storey dimension.
  • Choose Add structural object (Grid only).
  • OK
  • Go to Edit Menu
  • Edit Storey and grid system data.
  • Add new grid system data.
  • Modify / show grid system.
  • X-Grid data
  • Click Grid ID & Add for node (A to N)
  • Click X-coordinate & double click & Edit (Length wise)
  • Y-Grid data
  • Same as X-grid data input as drawing
  • Ok
  • Delete previous gird & Select new
  • To Input storey Data ( As per Section drawing),
  • Modify / Show storey data
  • Edit storey name (1st, 2nd,3rd,…,Top: check height elevation for this)

 

Storey Height  

Elevation

    Master Storey Similar S plane
Storey 2 3 6.45     No P-Storey
Storey 1 3 3.45     No P-Storey
P-Storey 0.45 0.45     Yes None
Base 0      
  • OK
  • Ok
  • To view on 3D
  • Go & Click 3D view

Step:2 : Defining & Assigning Materials on Member/ beams

      Defining Material:

  • Go to define Tab
  • Material Property
  • Add new material
  • Region : Nepal/ India
  • Material Type : Concrete
  • Standard: Indian
  • Grade : M20 (i.e. for Slab & Beam)
  • OK
  • Material Property data
  • Material Name : M20
  • Ok

Again,

  • Add new material
  • Region : Nepal/ India
  • Material Type : Concrete
  • Standard: Indian
  • Grade : M25 for Column
  • OK
  • Material Property data
  • Material Name : M25
  • Ok

     Assign Material:

Note:  (Before Assign material go to Plan view)

  • Go to plan view
  • Select plan view ( now we are planning to draw my beam in P-storey so, select P-storey by cursor; i.e. my master plan)
  • Select: P-storey
  • Ok

 To drawing beams, first define beam

  • Go to define ( to drawing beams)
  • Section properties
  • Frame Sections
  • Add new property
  • Select type : Concrete
  • Beam name in property name : B240X500
  • Material: M20
  • Under Section dimension:
  • Depth: 500 mm
  • Width: 240 mm
  • Select property/ Modifier
  • Change torsion constant 1 to 01
  • Moment of Inertia 2 axis : 0.03
  • Moment of Inertia 3 axis : 0.25
  • Ok

    Reinforcement (modify/ show rebar)

  • Design type
  • Check on M3 design only (beam) for Beam
  • Define Cover
  • Top bar : 25 mm
  • Bottom bar:25 mm
  • Ok

Similarly, Add new property for other beam also

  • Before assigning beam
  • Change one storey to similar storey from bottom tab

(note: except base all the floor are same so select similar storey)

i.e. Same beam will be replicate on storey 1,2,3,.. etc

For drawing beam

  • Go to left tab of screen
  • Select draw beam /column break icon
  • Close property menu.
  • Start drawing a beam manually as per grid
  • Go To view tab menu
  • Set grid system visibility
  • Show-3D

 

Step:3: Defining & Assigning Materials on Column

      Defining Material:

  • Go to define Tab
  • Section Property
  • Frame section
  • Add new property
  • Choose rectangular under Concrete type
  • Input data
  • Property name : C 240X400
  • Material : M25
  • Depth=400 mm
  • Width=240 mm
  • Go to property modifiers (right side) to modify property
  • Change torsional constant from 1 to 0.01
  • MOI about 2 axis : 0.7
  • MOI about 3 axis: 0.7
  • Ok
  • Click modify /show rebar (under reinforcement ;right side)
  • Design type
  • P M2-M3 Design (Column)
  • Ok
  • Ok
  • Select assign column
  • ok

      Assign Material on column:

(Before Assign material go to            Icon)

  • Select Up arrow and click for top stories
  • Change to all stories from bottom layer
  • Go to Left side menu
  • Click quick draw column Icon
  • Close & start assign manually
  • Go to 3D view to see.
  • Go to Plan View ( note: But in actual plan orientation of column is not similar direction)
  • First select the Column which you want to rotate 90 degree for multiple section press CTRL.
  • Go to plan view in all stories node

 

For vertical column, left side

 

  • Go to Assign
  • Frame
  • Select local axis
  • Define orientation
  • Angle : 90
  • Apply
  • Ok

For Inclined column, right side

  • Go to Assign
  • Clear display of assign
  • First, Go to draw beam icon from left menu
  • Draw
  • Select those column to change
  • Assign
  • Frame
  • Local axes
  • Angle : 79.1
  • Apply
  • Ok

Now Split beams & Column at joint:

  • Select entire drawing
  • Selecting joint in which we want to split the beam (i.e selecting all column & joint and deselect the point if you don’t want to split).
  • Click up & down arrow icon on main tab
  • Go to break at intersection with selected frame & joints
  • Apply
  • Ok

To merge two beam.

  • select the beam that you need to merge
  • Click join frame icon (near divide frame icon on top tab)

Leave a Comment