1. OpenSees Navigator & Hybrid Simulation
Project by PEER in support of NEES
Graduate Student: Andreas Schellenberg
Advisor: Prof. Stephen Mahin

2. Introduction
MATLAB based Graphical User Interface developed by Andreas Schellenberg & Tony Yang
Pre- and post-processing for OpenSees
Integration of Hybrid Simulation into OpenSees
Design toolboxes: NSP, AISC design checks, …

3. Motivation Graphical input is more flexible than TCL text input
Most researchers use MATLAB to do the post-processing, and MATLAB/Simulink is the typical framework for implementing hybrid analyses
OpenSees Navigator will create the OpenSees (hybrid) model and graphically display results before, during or after a test
Flexible to use and requires no programming skills

4. OpenSees Navigator

5. Define Geometry Stick Model Beam Model Moment Frame
Inverted-V Braced Frame
EBF Model
Zipper Frame

6. Define Geometry: Braced Frame

7. Define Geometry: Display
Node:
-Numbers
-SP Constraints
-MP Constraints
-Masses
-Loads/Disp.
Element:
-Types
-GeoTrans
-Local Axes

8. Edit Geometry
Node:
-Add
-Delete
-Move
Element:
-Divide

9. Define Material Templates: -Elastic -ElasticNoTension -ElasticPP
-ElasticPPGap
-Hardening
-Steel01
-Steel02
-Concrete01
-Concrete02
-Concrete03
-Hysteretic
-Viscous
-Parallel
-Series

10. Define Steel02 Material: 50ksi

11. Define Section
Templates:
-Elastic
-Uniaxial
-Fiber
-Aggregator

12. Define Fiber Section: Column

13. Define Element Templates: -Truss -CorotationalTruss -ElasticBeamColumn
-ForceBeamColumn
-DispBeamColumn
-HingeBeamColumn
-ZeroLength
-ExpTruss
-ExpBeamColumn
-ExpChevronBrace

14. Define ElasticBeamColumn Element

15. Define ForceBeamColumn Element

16. Define TimeSeries Templates: -Constant -Linear -Rectangular -Sine
-PathValue
-PathFile

17. Define PathFile TimeSeries: SACNF01

18. Define LoadPattern
Templates:
-Plain
-UniformExcitation

19. Define UniformExcitation LoadPattern

20. Define Recorder Templates: -Node -Drift -Truss Element
-BeamColumn Element
Defaults:
-DefoShape
-EigenVector

21. Define BeamColumn Recorder

22. Define Analysis Options
Defaults:
-StaticDefault
-TransientDefault
-EigenDefault

23. Define New Analysis Options

24. Assign Menu Node: -SP Constraints -MP Constraints -Masses -Loads
-Displacements
Element:
-Types
-GeoTrans
-Rotations

25. Assign Menu

26. Assigned Properties
Nodal Masses
Element Types

27. Define Analysis Cases
Defaults:
-StaticDefaultCase
-EigenDefaultCase

28. Define New Analysis Case
For Example:
Periods and Mode Shapes after Time-History Analysis

29. To Run OpenSees
Steps:
1. Write OpenSees Input Files (writes TCL files)
2. Save OpenSees.exe Path (needs to be done only once)
3. Run OpenSees

30. Post-Processing: Output
First:
Load OpenSees Results into Matlab

31. Post-Processing: Output
Now these are enabled

32. Mode Shape: 1st Mode Animation Speed AnalysisCase Recorder Mode
Magnification

33. Mode Shape: 3rd Mode Animation Speed AnalysisCase Recorder Mode
Magnification

34. Deformed Shape
Time Step
AnalysisCase
Recorder
Order
Magnification

35. Response
AnalysisCase
Recorder
Parameter
Node/Elem
DOF

36. Hybrid Simulation Example
Experimental ChevronBrace Element

37. Define Experimental Control
Templates:
-xPC Target
(-SCRAMNET 150)
-dSpace 1104
-BeamColumnSim
-ChevronBraceSim

38. Define ExpControl: xPC Target

39. Define Experimental Setup
Templates:
-OneStaticActuator
-TwoStaticActuators
-ThreeStaticActuators
-ChevronBrace

40. Define ExpSetup: ChevronBrace
rigidLength2
rigidLength3
© Tony Yang

41. Define Experimental Site
Templates:
-LocalSite
-RemoteSite

42. Define ExpSite: RFS

43. Define ExpElement: ChevronBrace

44. Modify Analysis Options
Integrator Type:
Use AlphaOS Method for Hybrid Simulation
Solution Algorithm:
The AlphaOS Method requires a Linear solution algorithm

45. Mode Shape: 1st Mode Animation Speed AnalysisCase Recorder Mode
Magnification

46. Mode Shape: 3rd Mode Animation Speed AnalysisCase Recorder Mode
Magnification

47. Deformed Shape
Time Step
AnalysisCase
Recorder
Order
Magnification

48. Response
AnalysisCase
Recorder
Parameter
Node/Elem
DOF

49. Summary OpenSees Navigator provides
Flexible and user friendly graphical user interface
Easy way to study material, section, element or system behaviors
Hybrid Simulation interface
Many built in post processing toolboxes
Great tool to visualize structural behavior
Graphical user interface for AISC steel manual section properties

50. Conclusion OpenSees Navigator 2.0 is available at
Andreas Schellenberg: Tony Yang: