Etabs Tutorial MSc Nguyen Thanh Tu
Example 3
Using Etabs to determine the internal forces of the 3-floor building with dimensions as
follow? The heights of story 1,2,3 and 4 are 4m, 4m, 4m and 3.2 m respectively. Column:
30 x40 cm; beam: 30x60 cm.
Other parameters are:
Concrete: B20: E = 2,7e7 Pa, =0.2.
Loads: Dead loads (DL): uniform load on all beams is 20kN/m
- Live loads (LL): uniform load on all beams is 10kN/m
- Wind Loads:
+ X direction: beams in A axis: 2.38 kN, beams in C axis: 1.78 kN.
+ Opposite X direction: beams in A axis: -1.78 kN, beams in C axis: -2.38 kN
+ Y direction: beams in 1 axis: 2.38 kN , beams in 2 axis: 1.78 kN.
+ Opposite Y direction: beams in 1 axis: -1.78 kN, beams in 2 axis: -2.38 kN
5 6
5
Tutorials
I. DEFINE MODEL
1.1. Open Etabs program.
1.2. Change Unit.
Choose kN-m
1.3. New Model Initialization.
Menu File > New Model
(or click mouse-left to the symbol)
- Choose “NO”
Structural Software For Building Analysis And Design Page 28
Etabs Tutorial MSc Nguyen Thanh Tu
Edit the gird of model
Edit the story height of model
Structural Software For Building Analysis And Design Page 29
Etabs Tutorial MSc Nguyen Thanh Tu
• Set Elevation view
Menu View → Set Elevation or click:
• Note: remember to Save file regularly. Each model should be in a folder.
1.4. Define parameter
a. Define material
Menu Define > Material Properties or click
Isotropic:
Mass per unit Volume: Weight per unit Volume:
Structural Software For Building Analysis And Design Page 30
Etabs Tutorial MSc Nguyen Thanh Tu
Modulus of Elasticity: Poission’s Ratio:
Coeff of The Thermal Expansion Shear Modulus (chương trình tự tính)
Orthotropic:
b. Define frame section.
Menu Define > Frame Sections or click
• Note : Beam : Bbxh
Column : Cx×y
T3:
T2 :
c. Define Static Load Cases
Menu Define > Static Load Cases or click:
d. Define Load Combinations
Menu Define > Load Combinations or click
Structural Software For Building Analysis And Design Page 31
Etabs Tutorial MSc Nguyen Thanh Tu
No Load Combination Load combination Case Name Scale factor
Name Type
1 Comb1 Add DL; LL 1;1
2 Comb2 Add DL; PWLX 1;1
3 Comb3 Add DL; NWLX 1;1
4 Comb4 Add DL; PWLY 1;1
5 Comb5 Add DL; NWLY 1;1
6 Comb6 Add DL; LL; PWLX 1; 0.9; 0.9
7 Comb7 Add DL; LL; NWLX 1; 0.9; 0.9
8 Comb8 Add DL; LL; PWLY 1; 0.9; 0.9
9 Comb9 Add DL; LL; NWLY 1; 0.9; 0.9
10 Enve Enve Comb1; comb2; 1;1; …;1
… comb9
II. MODELING AND ANALYSIS
2.1. Modeling columns, beams, walls, slabs…
- Draw beams of model:
Set plan view > Story 1
Turn into mode: Similar Stories
Menu Draw > Draw Line Objects > Draw Lines in Region or at Clicks (Plan, Elev, 3D) or
click
Or Menu Draw > Draw Line Objects > Draw Lines (Plan, Elev, 3D) or click
- Draw Columns of model:
Set plan view. Turn into mode: Similar Stories
Menu Draw → Draw Line Objects →Create Columns in Region or at Click (Plan) or click
Structural Software For Building Analysis And Design Page 32
Etabs Tutorial MSc Nguyen Thanh Tu
- Set Building View Options:
Menu View →Set Building View Options hoặc Click
2.2. Assign Restrains (Supports)
Choose points that need restrains.
Menu Assign → Joint/Point→ Restrains (Supports) or click
Structural Software For Building Analysis And Design Page 33
Etabs Tutorial MSc Nguyen Thanh Tu
Fully supported: All degrees of freedom are restrained
Pinned: All three translational degrees of freedom are restrained
Roller: Only the vertical (translation 3) degree of freedom is restrained.
Fully free: All degrees of freedom are unrestrained.
• Note: if there is a wrong restrain, ......
• Checking the model before assigning loads:
- Checking Gird, Story Height
Edit gird: Menu Edit→ Edit Grid Data→ Edit Gird or right-click on screen and choose Edit
Grid Data
Edit story height: Menu Edit→ Edit Story Data→ Edit Story or right-click on screen and
choose Edit Story Data.
Insert or delete story: Menu Edit→ Edit Story Data→ Edit Story, choose Insert Story or
Delete Story
- Checking model: Checking numbers, sections, restrains…
2.3. Assigning loads
Frame/Line Loads
There are 2 types: Point Loads and Distributed Loads.
Stages:- Choose the beams/lines.
Structural Software For Building Analysis And Design Page 34
Etabs Tutorial MSc Nguyen Thanh Tu
- Distributed Loads: Menu Assign→ Frame/Line Loads → Distributed… or click
- Point Loads: Menu Assign→ Frame/Line Loads → Point… or click
a. PWLX B. MWLX
c. PWLY d. MWLY
2.4. Show/display Loads ; Elements
Show point loads or distributed loads of Frame/line Loads: Menu Display > Show Loads >
Frame Lines> Show Frame/Line Loads
2.5. Set analysis Options and Run.
- Menu: Analyze→ Set analysis Options:
Structural Software For Building Analysis And Design Page 35
Etabs Tutorial MSc Nguyen Thanh Tu
- Save and Run: Menu Analyze → Run Analysis or click or press F5
III. RESULT
3.1. Show Deformed Shape.
Menu Display→ Show Deformed Shape or click:
3.2. Show Member Forces/Stress Diagram.
Menu Display > Show Member Forces/Stress Diagram > Frame/Pier/Spandrel Forces or
click and choose Frame/Pier/Spandrel Forces
3.3. Show Support/Spring Reactions
Structural Software For Building Analysis And Design Page 36
Etabs Tutorial MSc Nguyen Thanh Tu
Menu Display > Show Member Forces/Stress Diagram > Support/Spring Reactions or
click-left and choose Support/Spring Reactions
3.4. Export to Execl.
Menu Display →Show tables
Choose Displacement or/and Reaction or/and Frame Output.
Choose Load Cases.
After click “Ok” There is a dialogue box
• Note: Copy (Ctrl + C) to excel to handle.
Structural Software For Building Analysis And Design Page 37
Etabs Tutorial MSc Nguyen Thanh Tu
3.5. Export to [Link].
Menu File → Print Tables → Analysis Output.
1. Maximum moment of the beam in 4th floor in Grid 2 and between girds A-B due to
Dead load.
2. Maximum displacement of the point at 1-C in 4th floor?
3. Maximum moment of the beam in 3th floor in Grid 1 and between girds A-B
4. Maximum shear of the beam in 3th floor in Grid 1 and between girds A-B
5. Moment of the column at gird 3-B due to wind load X in XOZ plan.
Structural Software For Building Analysis And Design Page 38
