OpenSees Examples Manual -- Structural Models & Anlyses: Difference between revisions

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<big><big>Introduction</big></big></h1>
<big><big>Introduction</big></big></h1>
|-
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| style="color:#000;" | <div >
| style="color:#000;" | <div>


The following examples are listed in order of simplicity.  
The following examples are listed in order of simplicity.  
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<!--        subSECTION 1        -->
<!--        subSECTION 1        -->
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
<big>[[OpenSees Example 1a. 2D Elastic Cantilever Column ]]</big>
<big>[[OpenSees Example 1a. 2D Elastic Cantilever Column ]]</big>
</div>
</div>
|}
|}
<!--        4 COLUMNS        -->
<!--        4 COLUMNS        -->
{| style="margin:0; background:none;"
{| style="margin:0; background:none;border:1px solid #black; "
<!--        Column 1  image    -->
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|  style="margin:0; style="width:25%; border:1px solid #black; background:#white; vertical-align:top;" |
|  style="margin:0; style="width:25%; border:1px solid #black; background:#white; vertical-align:top;" |
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! style="padding:2px" | <strong>Objectives</strong>
! style="padding:2px" | <strong>Objectives</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*overview of basic OpenSees input structure
*overview of basic OpenSees input structure
*coordinates, boundary conditions, element connectivity, nodal masses, nodal loads, etc.
*coordinates, boundary conditions, element connectivity, nodal masses, nodal loads, etc.
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! style="padding:2px" | <strong>Models</strong>
! style="padding:2px" | <strong>Models</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*elastic elements
*elastic elements
</div>
</div>
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! style="padding:2px" | <strong>Analyses</strong>
! style="padding:2px" | <strong>Analyses</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*static pushover
*static pushover
*dynamic earthquake-input
*dynamic earthquake-input
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<!--        subSECTION 2      -->
<!--        subSECTION 2      -->
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
<big>[[OpenSees Example 1b. Elastic Portal Frame]]</big>
<big>[[OpenSees Example 1b. Elastic Portal Frame]]</big>
</div>
</div>
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! style="padding:2px" |  
! style="padding:2px" |  
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
[[File:Example1b_Figure1.gif|link=OpenSees Example 1b. Elastic Portal Frame]]</div>
[[File:Example1b_Figure1.gif|link=OpenSees Example 1b. Elastic Portal Frame]]</div>
|}
|}
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! style="padding:2px" | <strong>Objectives</strong>
! style="padding:2px" | <strong>Objectives</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*two element types
*two element types
*distributed element loads
*distributed element loads
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! style="padding:2px" | <strong>Models</strong>
! style="padding:2px" | <strong>Models</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*elastic elements
*elastic elements
</div>
</div>
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! style="padding:2px" | <strong>Analyses</strong>
! style="padding:2px" | <strong>Analyses</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*static pushover
*static pushover
*dynamic earthquake-input
*dynamic earthquake-input
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<!--        subSECTION 1        -->
<!--        subSECTION 1        -->
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
<big>[[OpenSees Example 2a. Elastic Cantilever Column with variables]]</big>
<big>[[OpenSees Example 2a. Elastic Cantilever Column with variables]]</big>
</div>
</div>
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! style="padding:2px" |  
! style="padding:2px" |  
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
[[File:Example2a_figure1.GIF|link=OpenSees Example 2a. Elastic Cantilever Column with variables]]
[[File:Example2a_figure1.GIF|link=OpenSees Example 2a. Elastic Cantilever Column with variables]]
</div>
</div>
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! style="padding:2px" | <strong>Objectives</strong>
! style="padding:2px" | <strong>Objectives</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*introduce variable: define & use
*introduce variable: define & use
</div>
</div>
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! style="padding:2px" | <strong>Models</strong>
! style="padding:2px" | <strong>Models</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*elastic element
*elastic element
</div>
</div>
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! style="padding:2px" | <strong>Analyses</strong>
! style="padding:2px" | <strong>Analyses</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*static pushover
*static pushover
*dynamic earthquake-input
*dynamic earthquake-input
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<!--        subSECTION 2      -->
<!--        subSECTION 2      -->
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
<big>[[OpenSees Example 2b. Nonlinear Cantilever Column: Uniaxial Inelastic Section]]</big>
<big>[[OpenSees Example 2b. Nonlinear Cantilever Column: Uniaxial Inelastic Section]]</big>
</div>
</div>
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! style="padding:2px" |  
! style="padding:2px" |  
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
[[File:Example2b_figure1.GIF|link=OpenSees Example 2b. Nonlinear Cantilever Column: Uniaxial Inelastic Section]]
[[File:Example2b_figure1.GIF|link=OpenSees Example 2b. Nonlinear Cantilever Column: Uniaxial Inelastic Section]]
</div>
</div>
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! style="padding:2px" | <strong>Objectives</strong>
! style="padding:2px" | <strong>Objectives</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*first example of nonlinear model, set nonlinearity at section level
*first example of nonlinear model, set nonlinearity at section level
</div>
</div>
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! style="padding:2px" | <strong>Models</strong>
! style="padding:2px" | <strong>Models</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*nonlinearBeamColumn element
*nonlinearBeamColumn element
*uniaxial section
*uniaxial section
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! style="padding:2px" | <strong>Analyses</strong>
! style="padding:2px" | <strong>Analyses</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*static pushover
*static pushover
*dynamic earthquake-input
*dynamic earthquake-input
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<!--        subSECTION  3      -->
<!--        subSECTION  3      -->
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
<big>[[OpenSees Example 2c. Nonlinear Cantilever Column: Inelastic Uniaxial Materials in Fiber Section ]]</big>
<big>[[OpenSees Example 2c. Nonlinear Cantilever Column: Inelastic Uniaxial Materials in Fiber Section ]]</big>
</div>
</div>
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! style="padding:2px" |  
! style="padding:2px" |  
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
[[File:Example2c_figure1.GIF|link=OpenSees Example 2c. Nonlinear Cantilever Column: Inelastic Uniaxial Materials in Fiber Section ]]
[[File:Example2c_figure1.GIF|link=OpenSees Example 2c. Nonlinear Cantilever Column: Inelastic Uniaxial Materials in Fiber Section ]]
</div>
</div>
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! style="padding:2px" | <strong>Objectives</strong>
! style="padding:2px" | <strong>Objectives</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*set nonlinearity at material level
*set nonlinearity at material level
*material stress-strain response is assembled into fiber section
*material stress-strain response is assembled into fiber section
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! style="padding:2px" | <strong>Models</strong>
! style="padding:2px" | <strong>Models</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*nonlinearBeamColumn element
*nonlinearBeamColumn element
*uniaxial material
*uniaxial material
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! style="padding:2px" | <strong>Analyses</strong>
! style="padding:2px" | <strong>Analyses</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*static pushover
*static pushover
*dynamic earthquake-input
*dynamic earthquake-input
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<!--        subSECTION 1        -->
<!--        subSECTION 1        -->
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
<big>[[OpenSees Example 3. Cantilever Column with units]]</big>
<big>[[OpenSees Example 3. Cantilever Column with units]]</big>
</div>
</div>
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! style="padding:2px" |  
! style="padding:2px" |  
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
[[File:Example3_figure1.GIF|link=OpenSees Example 3. Cantilever Column with unit]]
[[File:Example3_figure1.GIF|link=OpenSees Example 3. Cantilever Column with unit]]
</div>
</div>
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! style="padding:2px" | <strong>Objectives</strong>
! style="padding:2px" | <strong>Objectives</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*units, defined and used (they will be used in all subsequent examples)
*units, defined and used (they will be used in all subsequent examples)
*separate model-building and analysis files
*separate model-building and analysis files
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! style="padding:2px" | <strong>Models</strong>
! style="padding:2px" | <strong>Models</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*elastic elements
*elastic elements
*inelastic uniaxial section
*inelastic uniaxial section
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! style="padding:2px" | <strong>Analyses</strong>
! style="padding:2px" | <strong>Analyses</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*static pushover
*static pushover
*dynamic earthquake-input
*dynamic earthquake-input
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<!--        subSECTION 2      -->
<!--        subSECTION 2      -->
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
<big>[[OpenSees Example 4. Portal Frame]]</big>
<big>[[OpenSees Example 4. Portal Frame]]</big>
</div>
</div>
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! style="padding:2px" |  
! style="padding:2px" |  
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
[[File:Example4_figure1.GIF|link=OpenSees Example 4. Portal Frame]]
[[File:Example4_figure1.GIF|link=OpenSees Example 4. Portal Frame]]
</div>
</div>
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! style="padding:2px" | <strong>Objectives</strong>
! style="padding:2px" | <strong>Objectives</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*use previously-defined procedures to simplify input
*use previously-defined procedures to simplify input
*introduce more analysis types
*introduce more analysis types
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! style="padding:2px" | <strong>Models</strong>
! style="padding:2px" | <strong>Models</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*elastic elements
*elastic elements
*inelastic uniaxial section
*inelastic uniaxial section
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! style="padding:2px" | <strong>Analyses</strong>
! style="padding:2px" | <strong>Analyses</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*static reversed cyclic analysis  
*static reversed cyclic analysis  
*dynamic sine-wave input analysis (uniform excitation)  
*dynamic sine-wave input analysis (uniform excitation)  
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<!--        subSECTION  3      -->
<!--        subSECTION  3      -->
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
<big>[[OpenSees Example 5. 2D Frame, 3-story 3-bay, Reinforced-Concrete Section & Steel W-Section]]</big>
<big>[[OpenSees Example 5. 2D Frame, 3-story 3-bay, Reinforced-Concrete Section & Steel W-Section]]</big>
</div>
</div>
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! style="padding:2px" |  
! style="padding:2px" |  
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
[[File:Example5_figure1.GIF|link=OpenSees Example 5. 2D Frame, 3-story 3-bay, Reinforced-Concrete Section & Steel W-Section]]
[[File:Example5_figure1.GIF|link=OpenSees Example 5. 2D Frame, 3-story 3-bay, Reinforced-Concrete Section & Steel W-Section]]
</div>
</div>
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! style="padding:2px" | <strong>Objectives</strong>
! style="padding:2px" | <strong>Objectives</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*2D frame of fixed geometry: 3-story, 3-bay
*2D frame of fixed geometry: 3-story, 3-bay
*nodes and elements are defined manually, one by one
*nodes and elements are defined manually, one by one
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! style="padding:2px" | <strong>Models</strong>
! style="padding:2px" | <strong>Models</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*Reinforced-Concrete Section
*Reinforced-Concrete Section
*Steel W-Section
*Steel W-Section
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! style="padding:2px" | <strong>Analyses</strong>
! style="padding:2px" | <strong>Analyses</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*static reversed cyclic analysis  
*static reversed cyclic analysis  
*dynamic sine-wave input analysis (uniform excitation)  
*dynamic sine-wave input analysis (uniform excitation)  
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<!--        subSECTION  4      -->
<!--        subSECTION  4      -->
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
<big>[[OpenSees Example 6. generic 2D Frame, N-story N-bay, Reinforced-Concrete Section & Steel W-Section]]</big>
<big>[[OpenSees Example 6. generic 2D Frame, N-story N-bay, Reinforced-Concrete Section & Steel W-Section]]</big>
</div>
</div>
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! style="padding:2px" |  
! style="padding:2px" |  
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
[[File:Example6_figure1.GIF|link=OpenSees Example 6. generic 2D Frame, N-story N-bay, Reinforced-Concrete Section & Steel W-Section]]
[[File:Example6_figure1.GIF|link=OpenSees Example 6. generic 2D Frame, N-story N-bay, Reinforced-Concrete Section & Steel W-Section]]
</div>
</div>
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! style="padding:2px" | <strong>Objectives</strong>
! style="padding:2px" | <strong>Objectives</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*2D frame geometry of variable geometry ( # stories and # bays are variables)
*2D frame geometry of variable geometry ( # stories and # bays are variables)
*node and element definition is automated
*node and element definition is automated
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! style="padding:2px" | <strong>Models</strong>
! style="padding:2px" | <strong>Models</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*Reinforced-Concrete Section
*Reinforced-Concrete Section
*Steel W-Section
*Steel W-Section
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! style="padding:2px" | <strong>Analyses</strong>
! style="padding:2px" | <strong>Analyses</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*static reversed cyclic analysis  
*static reversed cyclic analysis  
*dynamic sine-wave input analysis (uniform excitation)  
*dynamic sine-wave input analysis (uniform excitation)  
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<!--        subSECTION 1        -->
<!--        subSECTION 1        -->
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
<big>[[OpenSees Example 7. 3D Frame, 3-story 3-bayX 3-bayZ, Reinforced-Concrete Section & Steel W-Section]]</big>
<big>[[OpenSees Example 7. 3D Frame, 3-story 3-bayX 3-bayZ, Reinforced-Concrete Section & Steel W-Section]]</big>
</div>
</div>
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! style="padding:2px" |  
! style="padding:2px" |  
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
[[File:Example7_figure1.GIF|link=OpenSees Example 7. 3D Frame, 3-story 3-bayX 3-bayZ, Reinforced-Concrete Section & Steel W-Section]]
[[File:Example7_figure1.GIF|link=OpenSees Example 7. 3D Frame, 3-story 3-bayX 3-bayZ, Reinforced-Concrete Section & Steel W-Section]]
</div>
</div>
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! style="padding:2px" | <strong>Objectives</strong>
! style="padding:2px" | <strong>Objectives</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*3D frame of fixed geometry
*3D frame of fixed geometry
*nodes and elements are manually manually, one by one
*nodes and elements are manually manually, one by one
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! style="padding:2px" | <strong>Models</strong>
! style="padding:2px" | <strong>Models</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*Reinforced-Concrete Section
*Reinforced-Concrete Section
*Steel W-Section
*Steel W-Section
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! style="padding:2px" | <strong>Analyses</strong>
! style="padding:2px" | <strong>Analyses</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*static reversed cyclic analysis  
*static reversed cyclic analysis  
*dynamic sine-wave input analysis (uniform excitation)  
*dynamic sine-wave input analysis (uniform excitation)  
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<!--        subSECTION 2      -->
<!--        subSECTION 2      -->
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
<big>[[OpenSees Example 8. generic 3D Frame, NStory NBayX NBayZ, Reinforced-Concrete Section & Steel W-Section]]</big>
<big>[[OpenSees Example 8. generic 3D Frame, NStory NBayX NBayZ, Reinforced-Concrete Section & Steel W-Section]]</big>
</div>
</div>
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! style="padding:2px" |  
! style="padding:2px" |  
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
[[File:Example8_figure1.GIF|link=OpenSees Example 8. generic 3D Frame, NStory NBayX NBayZ, Reinforced-Concrete Section & Steel W-Section]]
[[File:Example8_figure1.GIF|link=OpenSees Example 8. generic 3D Frame, NStory NBayX NBayZ, Reinforced-Concrete Section & Steel W-Section]]
</div>
</div>
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! style="padding:2px" | <strong>Objectives</strong>
! style="padding:2px" | <strong>Objectives</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*3D frame geometry of variable geometry ( # stories and # bays in X and Z are variables)
*3D frame geometry of variable geometry ( # stories and # bays in X and Z are variables)
*node and element definition is automated
*node and element definition is automated
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! style="padding:2px" | <strong>Models</strong>
! style="padding:2px" | <strong>Models</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*Reinforced-Concrete Section
*Reinforced-Concrete Section
*Steel W-Section
*Steel W-Section
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! style="padding:2px" | <strong>Analyses</strong>
! style="padding:2px" | <strong>Analyses</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*static reversed cyclic analysis  
*static reversed cyclic analysis  
*dynamic sine-wave input analysis (uniform excitation)  
*dynamic sine-wave input analysis (uniform excitation)  
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<!--        subSECTION 1        -->
<!--        subSECTION 1        -->
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
<big>[[OpenSees Example 9. Build & Analyze a Section Example]]</big>
<big>[[OpenSees Example 9. Build & Analyze a Section Example]]</big>
</div>
</div>
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! style="padding:2px" |  
! style="padding:2px" |  
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
[[File:Example9_figure1.GIF|link=OpenSees Example 9. Build & Analyze a Section Example]]
[[File:Example9_figure1.GIF|link=OpenSees Example 9. Build & Analyze a Section Example]]
</div>
</div>
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! style="padding:2px" | <strong>Objectives</strong>
! style="padding:2px" | <strong>Objectives</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*defined section using uniaxial behavior (define moment-curvature curve) or
*defined section using uniaxial behavior (define moment-curvature curve) or
*define section using uniaxial materials (define stress curve) in fiber section
*define section using uniaxial materials (define stress curve) in fiber section
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! style="padding:2px" | <strong>Models</strong>
! style="padding:2px" | <strong>Models</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*Uniaxial Nonlinear section
*Uniaxial Nonlinear section
*Fiber Steel W-section
*Fiber Steel W-section
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! style="padding:2px" | <strong>Analyses</strong>
! style="padding:2px" | <strong>Analyses</strong>
|-
|-
| style="color:#000;" | <div >
| style="color:#000;" | <div>
*2D static unidirectional moment-curvature analysis
*2D static unidirectional moment-curvature analysis
*3D static unidirectional moment-curvature analysis
*3D static unidirectional moment-curvature analysis

Revision as of 03:52, 10 November 2009



Introduction

The following examples are listed in order of simplicity. NOTE: gravity analysis is always included as part of the model building

OpenSees Examples -- Introductory Examples
Objectives
  • overview of basic OpenSees input structure
  • coordinates, boundary conditions, element connectivity, nodal masses, nodal loads, etc.
  • two-node, one element
Models
  • elastic elements
Analyses
  • static pushover
  • dynamic earthquake-input
Objectives
  • two element types
  • distributed element loads
Models
  • elastic elements
Analyses
  • static pushover
  • dynamic earthquake-input

OpenSees Examples -- Simple Nonlinear Analysis Examples
Objectives
  • introduce variable: define & use
Models
  • elastic element
Analyses
  • static pushover
  • dynamic earthquake-input
Objectives
  • first example of nonlinear model, set nonlinearity at section level
Models
  • nonlinearBeamColumn element
  • uniaxial section
Analyses
  • static pushover
  • dynamic earthquake-input
Objectives
  • set nonlinearity at material level
  • material stress-strain response is assembled into fiber section
  • reinforced-concrete fiber section
Models
  • nonlinearBeamColumn element
  • uniaxial material
  • fiber section (Reinforced-concrete fiber section)
Analyses
  • static pushover
  • dynamic earthquake-input

OpenSees Examples -- 2D Structural Modelling & Analysis Examples
Objectives
  • units, defined and used (they will be used in all subsequent examples)
  • separate model-building and analysis files
  • introduce PDelta effects (or not)
Models
  • elastic elements
  • inelastic uniaxial section
  • fiber section (Reinforced-concrete fiber section)
  • Linear, PDelta or Corotational Transformation
Analyses
  • static pushover
  • dynamic earthquake-input
Objectives
  • use previously-defined procedures to simplify input
  • introduce more analysis types
  • introduce procedure to read database input motion files (data with text in first lines)
Models
  • elastic elements
  • inelastic uniaxial section
  • inelastic fiber section (Reinforced-concrete fiber section)
Analyses
  • static reversed cyclic analysis
  • dynamic sine-wave input analysis (uniform excitation)
  • dynamic earthquake-input analysis (uniform excitation)
  • dynamic sine-wave input analysis (multiple-support excitation)
  • dynamic earthquake-input analysis (multiple-support excitation)
  • dynamic bidirectional earthquake-input analysis (uniform excitation)
Objectives
  • 2D frame of fixed geometry: 3-story, 3-bay
  • nodes and elements are defined manually, one by one
Models
  • Reinforced-Concrete Section
  • Steel W-Section
  • elastic uniaxial section
  • inelastic uniaxial section
  • inelastic fiber section
Analyses
  • static reversed cyclic analysis
  • dynamic sine-wave input analysis (uniform excitation)
  • dynamic earthquake-input analysis (uniform excitation)
  • dynamic sine-wave input analysis (multiple-support excitation)
  • dynamic earthquake-input analysis (multiple-support excitation)
  • dynamic bidirectional earthquake-input analysis (uniform excitation)
Objectives
  • 2D frame geometry of variable geometry ( # stories and # bays are variables)
  • node and element definition is automated
  • use previously-defined procedures to view model node numbers and elements, deformed shape, and displacement history, in 2D
Models
  • Reinforced-Concrete Section
  • Steel W-Section
  • elastic uniaxial section
  • inelastic uniaxial section
  • inelastic fiber section
Analyses
  • static reversed cyclic analysis
  • dynamic sine-wave input analysis (uniform excitation)
  • dynamic earthquake-input analysis (uniform excitation)
  • dynamic sine-wave input analysis (multiple-support excitation)
  • dynamic earthquake-input analysis (multiple-support excitation)
  • dynamic bidirectional earthquake-input analysis (uniform excitation)

OpenSees Examples -- 3D Structural Modelling & Analysis Examples
Objectives
  • 3D frame of fixed geometry
  • nodes and elements are manually manually, one by one
  • introduce rigid floor diaphragm
  • use previously-defined procedures to view model node numbers and elements, deformed shape, and displacement history, in 3D
Models
  • Reinforced-Concrete Section
  • Steel W-Section
  • Elastic or Fiber Section option is a variable within one input file
  • rigid diaphragm
Analyses
  • static reversed cyclic analysis
  • dynamic sine-wave input analysis (uniform excitation)
  • dynamic earthquake-input analysis (uniform excitation)
  • dynamic sine-wave input analysis (multiple-support excitation)
  • dynamic earthquake-input analysis (multiple-support excitation)
  • dynamic bidirectional earthquake-input analysis (uniform excitation)
Objectives
  • 3D frame geometry of variable geometry ( # stories and # bays in X and Z are variables)
  • node and element definition is automated
  • introduce user-input interface, the user is given the option as to what to view in model
Models
  • Reinforced-Concrete Section
  • Steel W-Section
  • Elastic or Fiber Section option is a variable within one input file
  • optional rigid diaphragm
Analyses
  • static reversed cyclic analysis
  • dynamic sine-wave input analysis (uniform excitation)
  • dynamic earthquake-input analysis (uniform excitation)
  • dynamic sine-wave input analysis (multiple-support excitation)
  • dynamic earthquake-input analysis (multiple-support excitation)
  • dynamic bidirectional earthquake-input analysis (uniform excitation)



OpenSees Examples -- Section Modelling And Analysis Examples
Objectives
  • defined section using uniaxial behavior (define moment-curvature curve) or
  • define section using uniaxial materials (define stress curve) in fiber section
Models
  • Uniaxial Nonlinear section
  • Fiber Steel W-section
  • Fiber RC symmetric rectangular unconfined-concrete section
  • Fiber RC symmetric rectangular unconfined & confined-concrete section
  • Fiber RC generalized rectangular section
  • Fiber RC generalized circular section
Analyses
  • 2D static unidirectional moment-curvature analysis
  • 3D static unidirectional moment-curvature analysis



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