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>

For two- and three-dimensional problems:

element elasticBeamColumn $eleTag $iNode $jNode $secTag $transfTag <-mass $massDens> <-cMass>

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$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
$secTag	identifier for previously-defined section object (assumes E = G = 1.0 and determine A, Iz, Iy, and J from section stiffness)
$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)

NOTE:

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

EXAMPLE:

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

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Code Developed by: fmk