Getting
1. 2. 3. 4.
Started
with
ETABS/
Modeling
in
ETABS/
ETABS
ETABS allow the users to Create and modify computer models. Create structural elements (columns, slabs, shear-walls, beams). Create structural elements (columns, slabs, shear-walls, beams). Analyze multiple scenarios and conditions, such as, Earthquake and wind loads, Sequential loading of construction, When the analysis is run, it goes from an object based to an element based model The analysis consist of frames, joints, linked with shell elements. Design and optimize multistory buildings (steel/composite, concrete frame and shear-walls.) All these steps through a single graphic user interface (GUI). Steps To Model a Building in ETABS 1. Define the building’s geometry (it’s footprint, including the adjacent structures, establish the gridlines, etc…). 2. Consider the implications of the geographic location of the building. 3. Establish the codes, analysis procedures and design criteria to be applied (for example, ASCE 7, UBC, IBC2000, Florida Building Code, ACI 318). 4. Define the loads (dead, live, reduction factors, wind and seismic). 5. Choose the structural elements, such as columns, shear-walls, etc. 6. Define the working units (for example, lb-in, kips-ft, etc.). 7. Define the various concrete strengths (eg, 4000 psi, 8000 psi, etc.). 8. Define the modulus of elasticity for concrete. 9. Define and create columns sizes and strengths for all different levels. 10. Define wall strengths and thickness. 11. Define steel strength and modulus of elasticity. 12. Place columns and shear-walls upon the gridlines. Modeling a Building in ETABS Note:click the images to see it clear
Parameters Columns:> 30" x 30 '' Beams :> 24" x 24 " Shear Walls :> outer walls =84" inner walls=24" Transvers walls = 8" Vertical Spacing b/w Coloumns = 25' Horizontal Spacing b/w Columns = 30'
Define a New Model
A New Model Initialization window opens in which you will be asked to whether to initialize your new model with definitions and preferences with existing .edb file... For instance click no in this problem
Define the ist Story
Choose "Grid Only" Model of ist story properly,run analysis and check for any improperly connected nodes. Alternatively use ETABS' Uniform grid spacing
or Etabs custom grid spacing
Define Properties 1. 2. 3. 4. 5.
Material Properties Frame Sections Slab/Wall Sections Static Load Cases Load Combinations
1-Material Add
New
Properties Material
Or Define Suppose
Add
Material Concrete
a
New
2-Frame Rectangular
of
Properties Fc'=4ksi
Sections Section
Place
The
Concrete
Coloumn
ADD
on
the
Grid
BEAM
ADD SECTIONS
WALL
ADD
SLAB
Define
The
Load
Load DDL SDL
Cases
Combinations = =
Design Service
Dead Dead
+ +
Live Live
Load Load
Draw Coloumn,beams,shear walls......to be continued...