OpenSees Example 5. 2D Frame, 3-story 3-bay, Reinforced-Concrete Section & Steel W-Section: Difference between revisions

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{| style="width:100%; vertical-align:top;background:#white;"
<h4>Distributed Plasticity Element, Fiber Section</h4>
<h4>Distributed Plasticity Element, Fiber Section</h4>
{| style="width:100%; border:1px solid #ddcef2; vertical-align:top;background:#white;"
|-
| style="color:#000;" | <div>
<h5>FiberSection -- Standard AISC W-Section</h5>
[[File:ExampleFigure_FiberSection_W.GIF|link=Editing OpenSees Example 5. 2D Frame, 3-story 3-bay, Reinforced-Concrete Section & Steel W-Section]]
----
<strong>Files</strong>
*[[Media:Ex5.Frame2D.build.InelasticFiberWSection.tcl|Ex5.Frame2D.build.InelasticFiberWSection.tcl]]
*[[Media:LibUnits.tcl|LibUnits.tcl]]
*[[Media:Wsection.tcl|Wsection.tcl]
----
<strong>Notes</strong>
*The section is broken down into fibers where uniaxial materials are defined independently.
*The program calculates flexural and axial stiffnesses/strength by integrating strains across the section.
*Standard AISC W-section
</div>
|}
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----
{| style="width:100%; border:1px solid #ddcef2; vertical-align:top;background:#white;"
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| style="color:#000;" | <div>
| style="color:#000;" | <div>
[[File:ExampleFigure_FiberSection.GIF|link=Editing OpenSees Example 5. 2D Frame, 3-story 3-bay, Reinforced-Concrete Section & Steel W-Section]]
<h5>FiberSection -- Reinforced Concrete Section</h5>
[[File:ExampleFigure_FiberSection_RC.GIF|link=Editing OpenSees Example 5. 2D Frame, 3-story 3-bay, Reinforced-Concrete Section & Steel W-Section]]
----
----
<strong>Files</strong>
<strong>Files</strong>
*[[Media:Ex5.Frame2D.build.InelasticFiberSection.tcl|Ex3.Canti2D.build.InelasticFiberSection.tcl]]
*[[Media:Ex5.Frame2D.build.InelasticFiberRCSection.tcl|Ex5.Frame2D.build.InelasticFiberRCSection.tcl]]
*[[Media:LibUnits.tcl|LibUnits.tcl]]
*[[Media:LibUnits.tcl|LibUnits.tcl]]
*[[Media:LibMaterialsRC.tcl|LibMaterialsRC.tcl]
*[[Media:BuildRCrectSection.tcl|BuildRCrectSection.tcl]
----
----
<strong>Notes</strong>
<strong>Notes</strong>
*The section is broken down into fibers where uniaxial materials are defined independently.  
*The section is broken down into fibers where uniaxial materials are defined independently.  
*The program calculates flexural and axial stiffnesses/strength by integrating strains across the section.  
*The program calculates flexural and axial stiffnesses/strength by integrating strains across the section.  
*fiber section
*Rectangular Reinforced-Concrete Section
*nonlinear beam-column elements
</div>
</div>
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Revision as of 20:17, 11 November 2009

Introduction

This examples demonstrates how to build a 3-story,3-bay frame. The nodes and elements are specified one by one.


Input

Model Building

The following tasks are performed when building the model

  • define units
  • define model
  • define recorders for output
  • define & apply gravity

Elastic Element

Files

Notes

  • Effective axial and flexural stiffnesses are defined at the element level
  • elasticBeamColumn elements

Distributed Plasticity Element, Uniaxial Section

Files

Notes

  • Axial and flexural stiffnesses/strength are defined independently at the section level
  • uniaxial inelastic section (moment-curvature)
  • nonlinear beam-column elements

Distributed Plasticity Element, Fiber Section

FiberSection -- Standard AISC W-Section

Files

Notes

  • The section is broken down into fibers where uniaxial materials are defined independently.
  • The program calculates flexural and axial stiffnesses/strength by integrating strains across the section.
  • Standard AISC W-section
FiberSection -- Reinforced Concrete Section

Files

Notes

  • The section is broken down into fibers where uniaxial materials are defined independently.
  • The program calculates flexural and axial stiffnesses/strength by integrating strains across the section.
  • Rectangular Reinforced-Concrete Section


Lateral-Load Analysis

The following tasks are performed in the analysis

  • define lateral-load parameters
  • analyze

Static

Static Pushover

Files

Notes

  • One-directional monotonic displacement-controlled static loading
Static Reversed Cyclic

Files

Notes

  • One-directional displacement-controlled static loading
  • Displacement cycles are imposed in positive and negative direction

Dynamic EQ Ground Motion

Dynamic Uniform Sine-Wave Ground Motion

Files

Notes

  • Sine-wave acceleration input
  • Same acceleration input at all nodes restrained in specified direction
Dynamic Uniform Earthquake Ground Motion (typical)

Files

Notes

  • Earthquake (from file) acceleration input
  • Same acceleration input at all nodes restrained in specified direction
Dynamic Multiple-Support Sine-Wave Ground Motion

Files

Notes

  • Sine-wave displacement input
  • Different displacements are specified at particular nodes in specified directions
Dynamic Multiple-Support Earthquake Ground Motion

Files

Notes

  • Earthquake (from file) displacement input
  • Different displacements are specified at particular nodes in specified directions
Dynamic Bidirectional Earthquake Ground Motion (typical)

Files

Notes

  • Earthquake (from file) acceleration input
  • Different ground motion in two directions
  • Same acceleration input at all nodes restrained in specified direction

Run

The model and analysis combinations for this example are numerous. The following are an small subset, for demonstration purposes:

  • To run Elastic Mode, Static Pushover Analysis:
puts " -------------Elastic Model -------------"
puts " -------------Static Pushover Analysis -------------"
source Ex5.Frame2D.build.ElasticElement.tcl
source Ex5.Frame2D.analyze.Static.Push.tcl
  • To run Uniaxial Inelastic Section, Nonlinear Model, Uniform Earthquake Excitation
puts " -------------Uniaxial Inelastic Section, Nonlinear Model -------------"
puts " -------------Uniform Earthquake Excitation -------------"
source Ex5.Frame2D.build.InelasticSection.tcl 
source Ex5.Frame2D.analyze.Dynamic.EQ.Uniform.tcl
  • To run Uniaxial Inelastic Material, Fiber Section, Nonlinear Model, Dynamic Bidirectional Earthquake Ground Motion
puts " -------------Uniaxial Inelastic Material, Fiber Section, Nonlinear Model -------------"
puts " -------------Dynamic Bidirectional Earthquake Ground Motion  -------------"
source Ex5.Frame2D.build.InelasticFiberSection.tcl
source Ex5.Frame2D.analyze.Dynamic.EQ.bidirect.tcl


Notes

Return to OpenSees Examples Manual

Return to OpenSees User

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