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

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 

# 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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