Workshop On Structural Analysis And Design Using Staad.Pro
By SHASHIKANT GADAG
Civil Engineering Department National Institute of Technology, Warangal (AP) March 2013
Contents • Introduction to STAAD Pro • Terminology and Notations • Getting to Know the STAAD.Pro GUI • Introduction to Modelling • Material Properties and Section Properties • Supports,Loads and Load Combinations • Analysis and Post-processing • Modelling Complex Geometries • RC Building Analysis • Analysis for Seismic Loads
What STAAD Pro means??? ST ructural Analysis
A nd D esign Pro gram/Pro fessionals
About STAAD Pro. • World’s leading Structural Analysis and Design Software. • Based on FEM & FEA • FEM- Finite Element Method • FEA- Finite Element Analysis
What is an Analysis???? Calculation of the Response of Structures to Actions
Why to Perform an Analysis???? To Calculate 1.Stress Distributions 2.Natural Frequencies 3.Displacements 4.Critical Buckling Loads etc…
Terminology and Notations • Coordinate Systems Global Coordinate System Local Coordinate system • Units • Types of Structures Space structure(3D) Plane Structure(2D) Floor Structure(2D or 3D) Truss Structure(2D or 3D)
Conti… • Types of Members(1D) and Elements(2D & 3D) Truss Members Frame Members Plates and Shells Solids • Material Properties Young’s Modulus Poisson’s Ratio Density Damping Ratio • Stiffness Method
• Typical Load Calculations The Dead Load calculations are based on densities of materials and are assumed to be: Material
Unit Weights (kN/m3)
Brick Work
20
Plain Concrete
24
Reinforced Concrete
25
Earth
16-18
Mortar, Plaster
20
Steel
78.5
Water
10
Live loads are taken from IS:875 part-2 and are taken as 2 kN/m2 for floors of residential buildings, 3 kN/m2 for floors of commercial buildings, 1.5 kN/m2 for horizontal roofs with access, 0.75 kN/m2 for roofs with no access.
Getting to Know the STAAD.Pro -GUI • Main Menu • Toolbars • Mode bar
Main Menu • File
•Commands
• Edit
• Analyze
• View
• Mode
• Tools
• Windows
• Select
• Help
• Geometry
Toolbars Structure Toolbar
Structure Tools Toolbar
Rotate Toolbar
View Toolbar
Geometry Toolbar
Generate Toolbar
Results Toolbar
Selection Toolbar
Mode Toolbar
Labels Toolbar
Steel Design Toolbar
File Toolbar
Print Toolbar
Mode Bar
Introduction to Modeling Following are the steps involved in Modeling and Analysis: • Create a new structure • Customize the gridlines for creating nodes and beams • Add nodes and beams • Define material properties • Define section properties and assign to members
Conti… •Define supports and assign to nodes
• Define loads and assign to nodes and/or members • Define type of analysis • Choose post analysis print commands • Analyze the structure • Study the results
Material Properties & Section Properties • Define and Assign Material Properties General Materials Mode: Modeling
• Define and Assign Section Properties Mode: Modeling
Toolbar: Structure Tools
Property
Property
General
Property Page
Section Database
Supports, Loads and Load Combinations • Define and Assign Supports Mode: Modeling
General
Toolbar: Structure Tools
Support Property Page
Type of Supports
Restraints
Releases
FIXED
FX,FY,FZ,MX,MY,MZ
PINNED
FX,FY,FZ
MX,MY,MZ
ROLLERS RESTING ON HORIZONTAL PLANE
FY,FZ
FX,MX,MY,MZ
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Conti… • Loads and Load Combinations Mode: Modeling
General
Toolbar: Structure Tools
Load
Load Page
Analysis and Post-processing • Choose Analysis Type Mode: Modeling
Analysis/Print
Analysis
• Choose Post Analysis Print Command Mode: Modeling
Analysis/Print
Post-Print
• Analyze the Structure Main Menu: Analyze
Run Analysis (Shortcut Ctrl+F5)
Modeling Complex Geometries • Structure Wizard • Select Model Type- Different types are available • Double click on the model required • Define Parameters/Select Parameters dialog box • Go to File(Main Menu) – Merge Model with Staad pro Model
Conti… • Translational Repeat Mode: Main Menu
Geometry
Translational Repeat
• RC Building Analysis • Analysis for Seismic Loads
