Elastic Beam Column Element

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This command is used to construct an elasticBeamColumn element object. The arguments for the construction of an elastic beam-column element depend on the dimension of the problem, ndm:

For a two-dimensional problem:

element elasticBeamColumn $eleTag $iNode $jNode $A $E $Iz $transfTag <-mass $massDens> <-cMass>

For a three-dimensional problem:

element elasticBeamColumn $eleTag $iNode $jNode $A $E $G $J $Iy $Iz $transfTag <-mass $massDens> <-cMass>

$eleTag unique element object tag
$iNode $jNode end nodes
$A cross-sectional area of element
$E Young's Modulus
$G Shear Modulus
$J torsional moment of inertia of cross section
$Iz second moment of area about the local z-axis
$Iy second moment of area about the local y-axis
$transfTag identifier for previously-defined coordinate-transformation (CrdTransf) object
$massDens element mass per unit length (optional, default = 0.0)
-cMass to form consistent mass matrix (optional, default = lumped mass matrix)


The valid queries to an elastic beam-column element when creating an ElementRecorder object are 'force'.


element elasticBeamColumn 1 2 4 5.5 100.0 1e6 9; # elastic element tag 1 between nodes 2 and 4 with area 5.5, E 100 and Iz 1e6 which uses transformation 9

Code Developed by: fmk