opensees navigator & hybrid simulation project by peer in support of nees graduate student:...

OpenSees Navigator & Hybrid Simulation

Project by PEER in support of NEES Graduate Student: Andreas Schellenberg Advisor: Prof. Stephen Mahin

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IntroductionMATLAB based Graphical User Interface developed by Andreas Schellenberg & Tony YangPre- and post-processing for OpenSeesIntegration of Hybrid Simulation into OpenSeesDesign toolboxes: NSP, AISC design checks, …

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MotivationGraphical input is more flexible than TCL text inputMost researchers use MATLAB to do the post-processing, and MATLAB/Simulink is the typical framework for implementing hybrid analysesOpenSees Navigator will create the OpenSees (hybrid) model and graphically display results before, during or after a testFlexible to use and requires no programming skills

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OpenSees Navigator

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Define Geometry

Stick Model

Beam Model

Moment Frame

Inverted-V Braced Frame

EBF Model

Zipper Frame

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Define Geometry: Braced Frame

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Define Geometry: Display

Node:

-Numbers

-SP Constraints

-MP Constraints

-Masses

-Loads/Disp.

Element:

-Numbers

-Types

-GeoTrans

-Local Axes

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Edit Geometry

Node:

-Add

-Delete

-Move

Element:

-Add

-Delete

-Divide

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Define Material

Templates:

-Elastic

-ElasticNoTension

-ElasticPP

-ElasticPPGap

-Hardening

-Steel01

-Steel02

-Concrete01

-Concrete02

-Concrete03

-Hysteretic

-Viscous

-Parallel

-Series

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Define Steel02 Material: 50ksi

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Define Section

Templates:

-Elastic

-Uniaxial

-Fiber

-Aggregator

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Define Fiber Section: Column

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Define Element

Templates:

-Truss

-CorotationalTruss

-ElasticBeamColumn

-ForceBeamColumn

-DispBeamColumn

-HingeBeamColumn

-ZeroLength

-ExpTruss

-ExpBeamColumn

-ExpChevronBrace

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Define ElasticBeamColumn Element

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Define ForceBeamColumn Element

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Define TimeSeries

Templates:

-Constant

-Linear

-Rectangular

-Sine

-PathValue

-PathFile

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Define PathFile TimeSeries: SACNF01

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Define LoadPattern

Templates:

-Plain

-UniformExcitation

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Define UniformExcitation LoadPattern

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Define Recorder

Templates:

-Node

-Drift

-Truss Element

-BeamColumn Element

Defaults:

-DefoShape

-EigenVector

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Define BeamColumn Recorder

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Define Analysis Options

Defaults:

-StaticDefault

-TransientDefault

-EigenDefault

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Define New Analysis Options

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Assign Menu

Node:

-SP Constraints

-MP Constraints

-Masses

-Loads

-Displacements

Element:

-Types

-GeoTrans

-Rotations

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Assign Menu

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Assigned Properties

Nodal Masses

Element Types

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Define Analysis Cases

Defaults:

-StaticDefaultCase

-EigenDefaultCase

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Define New Analysis Case

For Example:

Periods and Mode Shapes after Time-History Analysis

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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

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Post-Processing: Output

First:

Load OpenSees Results into Matlab

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Post-Processing: Output

Now these are enabled

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Mode Shape: 1st Mode

Animation Speed

AnalysisCase Recorder Mode Magnification

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Mode Shape: 3rd Mode

Animation Speed

AnalysisCase Recorder Mode Magnification

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Deformed Shape

Time Step AnalysisCase Recorder Order Magnification

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Response

ParameterAnalysisCase Recorder Node/Elem

DOF

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Hybrid Simulation Example

Experimental ChevronBrace Element

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Define Experimental Control

Templates:

-xPC Target

(-SCRAMNET 150)

-dSpace 1104

-BeamColumnSim

-ChevronBraceSim

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Define ExpControl: xPC Target

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Define Experimental Setup

Templates:

-OneStaticActuator

-TwoStaticActuators

-ThreeStaticActuators

-ChevronBrace

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Define ExpSetup: ChevronBrace

rigidLength2

rigidLength3

© Tony Yang

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Define Experimental Site

Templates:

-LocalSite

-RemoteSite

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Define ExpSite: RFS

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Define ExpElement: ChevronBrace

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Modify Analysis Options

Integrator Type:

Use AlphaOS Method for Hybrid Simulation

Solution Algorithm:

The AlphaOS Method requires a Linear solution algorithm

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Mode Shape: 1st Mode

Animation Speed

AnalysisCase Recorder Mode Magnification

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Mode Shape: 3rd Mode

Animation Speed

AnalysisCase Recorder Mode Magnification

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Deformed Shape

Time Step AnalysisCase Recorder Order Magnification

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Response

ParameterAnalysisCase Recorder Node/Elem

DOF

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SummaryOpenSees 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

Conclusion

OpenSees Navigator 2.0 is available atOpenSees Navigator 2.0 is available athttp://peer.berkeley.edu/OpenSeesNavigator

Andreas Schellenberg: Tony Yang: aschell@peer.berkeley.edu yang@peer.berkeley.edu