Element recorders - eesd-epfl/OpenSees GitHub Wiki

• "force”: resisting forces in global coordinates (alternatively, “globalForce”, “forces”). The ordering of the 18 outputs is: forces at node I, forces at node J, internal forces (node E). All forces are expressed in the global coordinate system. In symbolic notation:

• "basicForces”: basic (interface) forces. The ordering of the 12 outputs is: axial force and moments at the first section, including torsional response, axial force and moments at the second and third section, shear interface responses. All forces are expressed in local coordinate system. In symbolic notation:

• “drift”: two-element vector containing the current element drifts respectively, in shear and flexure. Does not correspond exactly to the recorder in Tremuri, as this gives the current value and the maximum value reached in the loading history. The latter output in OpenSees can be asked through an “EnvelopeElement” recorder or obtained in post-processing.

# element output 
recorder Element  -file "fName1" -time -ele $eTag force   
recorder Element  -file "fName2" -time -ele $eTag forceLocal  
recorder Element  -file "fName3" -time -ele $eTag drift  

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