1. Bridge modelling with
CSI software

3. CSI Bridge 2017 Version 19 – Latest release 19.2.1
It’s SAP2000 v19, but with specific modules for bridge modeling, analysis and design
Analysis engine is exactly the same
Everything you can do with SAP2000, can also be done with CSI Bridge
It only adds the specific modules for bridges

4. Modules Classical Division of Structural Analysis Software
Preprocessor
Analysis engine
Postprocessor
Trend to add a new module
Design

5. Preprocessor Similar to SAP2000
Introduction to the concept of parametric bridge modeling
Existence of two parallel databases:
Finite elements (classical)
Bridge objects (new)
Automatic generation of the finite elements model from the parametric bridge model, with just one click of a button
The user does not need to worry about joints, elements, meshes or loads
Great enhancement in productivity

6. Parametric Bridge Modeling
How can you characterize or define a bridge?
Geometrically by the horizontal and vertical layout
Any combination with straight and curved segments, for both horizontal and vertical layouts
Superelevation
Use of geographical bearings (angle with the cardinal points)
Straight layout line
Curved layout line

7. Parametric Bridge Modeling
Everything is defined with geometric reference to the layout line
Complex traffic lanes (with offsets and variable widths)
Example with 8 traffic lanes
Variable distance to the layout line
Start and end of the lanes not coincident with the bridge limits

8. Parametric Bridge Modeling
Wide libraries of standardized libraries
US, UK, China, Canada, Eurocodes, India, New Zealand and UIC
Flexibility in the creation of user-defined vehicles
Apply vertical, braking and centrifugal load components together or separately
Flexibility in defining the loaded lanes and reduction scale factors for simultaneity
Definition of the superimposed dead loads (linear and area loads) with reference to the layout line and to the deck edges (width)

9. Parametric Bridge Modeling
Bridge deck sections’ library
Concrete cross-sections
Composite cross-sections
User-defined cross-sections
Defining the properties
Drawing on Section Designer
Defined parametrically, all parameters can vary along the layout line

10. Parametric Bridge Modeling

11. Parametric Bridge Modeling
Span lengths definition
Columns definition:
height
Cross section
skews
bearings
Abutments definition:
foundations

12. Parametric Bridge Modeling
Plan view of spans, location of columns, skews and deck width

13. Parametric Bridge Modeling
Prestress
Jacking force definition
Losses calculation
Hyperstatic effects
Definition of the vertical and horizontal layout with reference to the layout line
Special module for segmental bridges

14. Parametric Bridge Modeling
Display the tendon locations along the layout line:
Plan view
Cross section
Elevation view

15. Generation of the Finite Elements Model
Automatic generation
Frame elements
Shell elements
Solid elements
Frames
Shells
Solids

16. Parametric Bridge Modeling
Other definitions
Mild rebar
Staged Construction
User-defined specific locations along the layout line
Diaphragms
Advantages
Great enhancement in productivity
No time spent on meshes and other specific details of a finite elements model
More time for Engineering tasks
Exploring a greater number of different solutions

17. Analysis Engine The same analysis engine used by SAP2000 Analyses:
Static
Linear
Nonlinear
Geometric Nonlinearity(P-Delta effects and large displacements)
Material Nonlinearity
Time-dependent effects on concrete and tendons
Staged Construction
Dynamic
Modal
Response Spectrum
Time-History (linear and nonlinear)
Buckling

18. Analysis Engine Elements library Frame and cable
Membrane, plate and shell
Solids
Links
Tension or compression
Dampers (multiple types)
Hysteretic
Friction
Generic (user-defined force-deformation relationship)
Among others

19. Analysis Engine 64 bit (>4 GB RAM) Several solvers
Standard
Advanced
Multi-threaded (parallel computing)
Several solvers specially conceived to accelerate dynamic nonlinear analyses
Provides information for diagnosing problems in the system resolution

20. Deformed shape and displacement contours
Postprocessor
Results display similar to SAP2000:
Deformed shape
Forces in frame elements
Forces/stresses in shell elements
Axial force in frames
Deformed shape and displacement contours
Membrane forces

21. Postprocessor Influence lines and surfaces display
Axial force in frames

22. Postprocessor New module: Bridge Object Response Display Forces
Displacements

23. Postprocessor
New module: Bridge Object Response Display
Stresses

24. Postprocessor New feature: bridge object response display
Bridge response for
Entire bridge section (blue)
Beams or girders (other colors)
Steel beams and deck sections in composite bridges
Exporting results to Excel

25. Design Similar to SAP2000 Design of deck section
Design of frame objects according to international design codes for steel and concrete structures
Reinforcement design for shell objects
Design of deck section
Serviceability Limit States
Stresses
Ultimate Limit States
Load resistance for prestressed sections
Load resistance of steel sections including class 4 sections

26. Design
Bridge design response display including forces vs. design forces
Exporting design results to Excel

27. Other Features
Automation and increased features using API (Application Programming Interface)
It is possible to create plug-ins
Programed by the user
For third-party applications
Example: Structural Optimizer from CSI
Compatible with most major programming languages
VBA (Excel, AutoCAD, etc.)
Matlab
VB.net and C#

28. Examples
Prestressed Bridges

29. Examples
Segmental Bridges

30. Examples
Composite Bridges

31. Examples
Cable-Stayed Bridges