How to make ETABS models

Email : eng_mmk@hotmail.comTel : +2/012/6227563

Note : for intermediate student in computer program not beginner Please any note call me to discuss it.

Example: Our example

residential building consist of 20 story need to make ANALYSIS & DESIGN with ETABS program:

we choose default of program

Starting ETABS.

At start convert unit to the unit you work withFrom file list – new model we get this massage

Define the Grid. When chose default this window appears

choose grid onlyin our example number of stories 20 story height 3m units kN -M

Plan View / 3D View.Your screen should show one window with a grid plan view of your model and one window with a grid 3D view of your model.

Make sure the KN-M is selected as your units in the lower right hand side of the window.

Now is a good time to save your model, so click on the File/Save and find a suitable location for your file.

Now import your DXF file from *file / import / DXF floor plan

Choose your file and open it

Choose layers to each element (beams ,floors ,etc….)

Choose the story you insert DXF in it

Define the Materials.

Next, we will define the materials used in the model. Concrete 40 & 60 grade will be used.

The two materials will be defined in successive steps.

Click Material Properties… from the Define pull down menu.

Click Add New Material…

For concrete 40 N/mm²-Type C40 for the Material Name.

-Select Isotropic for the Type of Material.

-Type 2.5 for the Mass per unit Volume.

-Type 25 for the Weight per unit Volume.

-Type 28E06 for the Modulus of Elasticity.

-Type 0.2 for Poisson’s Ratio.

-Type 9.900E-06 for the Coeff of Thermal Expansion.

-Select Concrete for the Type of Design.

-Type 32000 for f’c.-Type 460000 for fy-Type 460000 for fys.-Click OK

For concrete 60 N/mm²

The difference hereModulus of elasticity equal0.2*60(grade ) + 20 = 32

Define the columns.

Next, we will define the concrete columns used in the model. 25x80 cm columns will be used.

The two concrete materials defined in the previous step will be used to define the columns.

Click Define/Frame Sections… from the pull down menu.

Select Add Rectangular.

Define the 25x80 Cm column.

Type C25X80C60 as the Section Name.

Select C60 as the Material.

Type 0.8mfor the Depth.

Type 0.25m for Width.

Click OK.

Cracked section design

Define the Shear walls.

Next, define the concrete shear walls used in the model.

C60 shear walls will be used.

The concrete material defined earlier in the tutorial will be used to define the shear walls.

Click Wall/Slab/Deck Sections… from the Define pull down menu.

Select Add New Wall from the Click to: menu.

Define the C60 shear wall.

Type W25C60 as the Section Name.

Select C60 as the Material.

Type .25 for the Membrane Thickness.

Type .25 for the Bending Thickness.

Select Shell as the Type.

Click OK.

Cracked section design

Define the slab.

Next, define the concrete slabs used in the model.

C40 slabs will be used.

Click Wall/Slab/Deck Sections… from the Define pull down menu.

Select Add New slab from the Click to: menu.

Define the slab 22 cm post tension C40.

Type S22CMPT as the Section Name.

Select C40 as the Material.

Type .22 for the Membrane Thickness.

Type .22 for the Bending Thickness.

Select Shell as the Type.

Click OK.

Important note:-The slab is post tension so there is no cracked section design that mean no modifiers

Assigning slab sectionSelect the slab

Click wall/slab/deck section from shell/area From assign menu.

Select S22CMPT.

Click OK.

Drawing & assigning column and shear wall

First drawing column Select the point u want to be a column

Click Extrude points to lines from Edit menu.

Type -3 for dz.

Click OK.

Assigning column sectionSelect the column

Click Frame section from frame/line From Edit menu.

Select C25x80.

Click OK.

Second drawing shear wall-Select the lines u want to be a shear wall-Click Extrude lines to Areas from Edit menu.-Type -3 for dz.-click Delete Source Objects. Click OK.

Assigning shear wall sectionSelect the shear wall

Click wall/slab/deck section from shell/area From assign menu..

Select W25C60.

Click OK.Save your model.

Assigning Biers for wall sectionsSelect the shear wall each part alone If the shear wall consist of HZ & VL part (core) select HZ alone and VL alone

Click pier label from shell/area from assign menu

Write name P1 then click add new name then ok

Do that for all walls HZ or VL

The name appears on the wall

Each wall appears its name on it