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E4E4--E5 CIVIL E5 CIVIL
(TECHNICAL)(TECHNICAL)
STAAD PRO STAAD PRO –– An Overview An Overview
WELCOME
• This is a presentation for the E4-E5 Civil Technical
Module for the Topic: STAAD PRO – An Overview
• Eligibility: Those officers of civil wing who have got the
Up-gradation from E4 to E5.
• This presentation is last updated on 21-4-2011.
• You can also visit the Digital library of BSNL to see this
topic.
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AGENDA
Introduction
Features of STAAD PRO
Types of structures & Elements
Axis & Sign Convention in STAAD PRO
Steps of Design using STAAD PRO
Typical Command Sequence in STAAD PRO
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INTRODUCTION
Use of Computers in Structural Design of Buildings
• Computers can perform lengthy & tedious computations
at a very high-speed therefore computer programs are
used for analysis & design of structural members.
• Computer results are dependent on effectiveness of
software as certain assumptions are made in the
development of programs.
• But with experience & regular revision & updating, these
computer programs can be relied upon to give accurate
results.
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INTRODUCTION
• Limitations of Hand Computation Methods
– Applicable for small problems
– Tedious for even medium sized problems
– 3-d analysis almost impossible
• Advantages of Computer Analysis
– Matrix methods of structural analysis
– Development of numerical techniques
– Finite element method
– 3-d analysis can be done.
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STAAD PRO
Use of Computers in Structural Design of Buildings
• STAAD PRO is a very powerful software which can
be used fro 3-D analysis & is useful for analysis and
design of multi-storied buildings.
• Full range of analysis including static, P-delta,
response spectrum, time history, cable etc. and
• Steel design ,
• Concrete design and
• Timber design is available in STAAD PRO
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STAAD PRO
STAAD PRO
It provides the user environment for –
• Model development (Graphical as well as input
editor)
• Model visualization on screen,
• Analysis & design, and
• Verification
• Pre and Post Processor
• Isometric and perspective view and 3D shapes.
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Features of STAAD PRO
Features of STAAD PRO
• Object-oriented 2D/3D graphical model generation
with Flexible zoom, pan and multiple views.
• Built-in command file editor for text edit.
• Customizable structural templates for creating a
model.
• Unlimited Undo and Redo
• Pull down menus, floating tool bars, tool tip help &
quick data input through spreadsheets.
• FPS, Metric or SI units.
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Features of STAAD PRO
Features of STAAD PRO
• Supports truss & beam members, plates, solids, linear
and non-linear cables & curvilinear beams.
• Advanced automatic load generation facilities for
area, floor & moving loads.
• Display of loads, supports, properties, joints,
members, etc
� Rectangular and also cylindrical & reverse cylindrical
coordinate systems with mix and match capabilities. c
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Features of STAAD PRO
Features of STAAD PRO
• Easy auto mesh & auto refinement of user-defined
polygonal element boundary by simple mouse clicks,
including openings & column/ wall lines.
• Joint, member/ element, mesh generation with flexible
user-controlled numbering scheme
• Import/ Export DSF, DWG and Excel files.
• Presentation quality printer plots of geometry and results
as part of run output.
• Efficient algorithm minimizes disk space requirements.
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Features of STAAD PRO
Features of STAAD PRO
Model Generation
� Easy “snap-to” construction grid for laying out beams
and columns on irregular grids.
� Segments of repetitive geometry may be used to
generate complex structural models.
� Generate, copy, repeat, mirror, pivot, etc. for quick and
easy geometry generation.
� Comprehensive graphical editing.
� Library of commonly used structures and display of
properties, loadings, supports, orientations etc.
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Features of STAAD PRO
Features of STAAD PRO
Model Generation
� Graphical specification & display of properties,
loadings, supports, orientations etc.
� Import/Export of Auto Cad 2D/3D files to start model.
� Access to text editor to modify model quickly through
command syntax.
� User-controlled scale factors for deflected shapes.
� Customizable node/member & renumbering scheme.
Analysis & Design
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• Static Analysis
– Primary
– P-delta
– Non-linear
– Non-Linear Cable
• Basic Design
– Steel
– Concrete
• Dynamic analysis
– Rayleigh
– Eigen Solution
– Time History
– Response Spectrum
• Special Design
– Aluminum
– Timber
– Transmission Tower
Structure Types
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Structural Types:
d
d
d
d
d
d
d
ud
d
u
u
u
d
u
u
GX
GY
GZ
d
X
Z
TRUSS (2D) TRUSS (3D)
PLANE (2D) SPACE (3D) FLOOR
Element Types
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• Structural Elements
• Line
• Truss
• Beam
• Surface
• Plate/ Shell
• Surface
• Solid
d
d
d
d
u
u
u
u
d
u u
d
d
d
d
d
Boundary Condition
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• Fully Restrained
• Partially restrained w/ Springs
• Inclined
• Multilinear
• Partially Restrained
Some Special Supports –
• Elastic footing
• Elastic Mat
• Multi-linear Spring
• Inclined Support
Using STAAD PRO
Using STAAD PRO for Analysis & Design of Building –
Steps In Design
• Manual design of slabs, staircases, chajjas, lintels etc.
• Preparing structural model of building
• Preparing data for STAAD PRO program at all levels
i.e load intensities at all floors & wall load etc.
• Perform Analysis after complete feeding of data and
obtain the analysis out-put.
• Once analysis is completed for different load
combination design is performed for load envelope.
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Using STAAD PRO
Using STAAD PRO for Analysis & Design of Building
– Steps In Design
• STAAD PRO gives beam and column designs at all levels &
column reactions for design of foundations.
• Manual design of footings.
• After design by STAADPRO we note down area of steel for
column at various levels & grouping is done.
• For beams we note down main reinforcement & Shear
reinforcement at various sections & do detailing.
• Detailing of reinf done manually as per SP34 & IS 13920
• Prepare structural drawings using AutoCad or manually.
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Steps for Static Analysis
• Geometric Modeling
• Material Properties
• Sectional Properties
• Supports : Boundary Conditions
• Loads & Load combinations
• Special Commands
• Analysis Specification
• Design Command
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Geometric Modeling
• Nodal Co-ordinate Data
• Selection of Elements : Element Library
• Beam Elements : Beams, Columns, Truss Members
• Plate Elements : Structural Walls, Floor Slabs
• Plane Stress Elements : Shear Walls, Floor Slabs Acting
As Rigid Diaphragm To Lateral Loading
• Solid Elements : Thick Raft, Block Foundations
Surface Element:
– Rectangular
– Default Division 10X10, no. can be controlled
– Mainly introduced for Shear Wall Modeling & Design
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Sectional & Material Properties
• Beam Elements : Cross Section• Plate Elements : Thickness• Solid Elements : NIL• Material means a set of:
– Modulus of Elasticity– Poisson’s Ratio– Weight Density– Thermal Coefficient – Damping Ratio– Shear Modulus
• Geometric Constant– Beta (�) Angle– Reference Point
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Axis & Sign Convention
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• Local & Global Axis System for Member– Depends on Connectivity
– Upward Global Axis
Axis & Sign Convention
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•Different Axis Systems for Member Loads (Global-Y is Vertical)
Local Y Direction (UNI Y -2) Global Y Direction (UNI GY -2)
Projected Y Direction (UNI PY -2) Theory Projected Y Direction (UNI PY -2) Graphics
Axis & Sign Convention
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• Member End Forces - Transnational Degrees
LoadsSelf Weight
Joint Loads
– Concentrated Load & Moments
– Support Displacement Loads
Member Loads
– Uniform Force & Moment (Full / Partial) (d1, d2, d3)
– Concentrated Force & Moment (d1, d2)
– Floor Load & Area Load (new GX, GZ Floor Load)
– Linear Varying & Trapezoidal Load
– Pre-Stress / Post-Stress Load
– Hydrostatic Trapezoidal Load
– Temperature Load (x, y, z)
– Fixed End Load
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Loads
Plate Element Loads
Pressure (Full / Partial)
Concentrated Force (x, y)
Trapezoidal & Hydrostatic
Trapezoidal Load
Surface Element Pressure
Generated Loads
Wind Load
Seismic Co-efficient Method
Repetitive Moving Load
Dynamic Loads
Time History
Response Spectrum
Combined Effect of
Loads
Combination (Algebraic,
SRSS, ABS)
Repeat Load
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Codes & Shapes
• Design Codes
– IS 800 for Steel design
– IS 456 & 1893 for RCC design
• Shapes supported
– Shapes include I-Beams with or without cover plates,
channels, angles, double angles/ channels, pipes
and tubes (HSS Sections) for Steel design
– Also built-in steel tables
– Design of circular, rectangular, I and L shaped,
trapezoidal and Tee sections for RCC design.
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Earthquake Analysis
• IS 1893 – 2002 (Part 1) Parameters:
– Seismic Zone Coefficient
– Response Reduction Factor
– Importance Factor
– Soil Site Factor
– Type of Structure
– Damping Ratio (obtain Multiplication Factor for Sa/g)
– Depth of Foundation below Ground Level
• Reduction of Ah due to Depth of Foundation
• Acceleration as Function of Time Period and Soil Type
• Evaluation of Base Shear
• Distribution of Lateral Storey Forces
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Typical Command SequenceSTAAD SPACE
UNIT METER KN
JOINT COORDINATES
MEMBER INCIDENCES
MATERIAL CONSTANTS
MEMBER PROPERTY
SUPPORTS
DEFINE 1893 LOAD
ZONE…. RF….. I ….
JOINT WEIGHT
LOAD 1 SEISMIC X DIRECTION
LOAD 2 SEISMIC Z DIRECTION
LOAD 3 LOAD
SELFWEIGHT
LOAD 4 ….
LOAD COMB 11
PERFORM ANALYSIS
PRINT SUPPORT REACTION
START CONCRETE DESIGN
CODE INDIAN
FC ….. ALL
FYMAIN ….. ALL
FYSEC …. ALL
DESIGN COLUMN
DESIGN BEAM
END CONCRETE DESIGN
FINISH
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