Getting Started with OpenSees -- Summary of Model-Building Input File

• GettingStarted Manual
  • Introduction
  • Download OpenSees
  • Run OpenSees
  • Problem Definition
  • Model Builder
  • Nodes
  • Elements
  • Recorders
  • Summary of Model-Building Input File
  • Loads and Analysis
  • Gravity Loads
  • Summary of Gravity Loads
  • Lateral Loads -- Static Pushover
  • Lateral Loads -- Cyclic Lateral Load
  • Lateral Loads -- Dynamic ground motion

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The following is a compilation of all the commands necessary to build the model:

model basic -ndm 2 -ndf 3
# nodal coordinates:
node 1 0 0
node 2 504 0
node 3 0 432
node 4 504 432 

# bondary conditions:
fix 1 1 1 1
fix 2 1 1 1
fix 3 0 0 0
fix 4 0 0 0

# nodal masses:
mass 3 5.18 0. 0.
mass 4 5.18 0. 0.

# transformation:
geomTransf Linear 1 

# element connectivity:
element elasticBeamColumn 1 1 3 3600 4227 1080000 1
element elasticBeamColumn 2 2 4 3600 4227 1080000 1
element elasticBeamColumn 3 3 4 5760 4227 4423680 1

# recorders
recorder Node -file Node3.out -time -node 3 -dof 1 2 disp
recorder Element -file Element1.out -time -ele 1 force

The above commands can be input line by line at the OpenSees command prompt:

Otherwise, they can be saved into an input file called example.tcl. This file can then be sourced in from the OpenSees command line:

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