3.1.9.5. Elastic Beam Column Element

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 <-release $relcode> <-mass $massDens> <-cMass>

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

For a three-dimensional problem:

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

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

Argument	Type	Description
$eleTag	integer	Unique element object tag
$iNode $jNode	integer	End node tags
$A	float	Cross-sectional area of element
$E	float	Young’s Modulus
$G	float	Shear Modulus
$J	float	Torsional moment of inertia of cross section
$Iz	float	Second moment of area about the local z-axis
$Iy	float	Second moment of area about the local y-axis
$secTag	integer	Identifier for previously-defined section object
$transfTag	integer	Identifier for previously-defined coordinate-transformation object
$relcode	integer	Code for moment releases (0=no release, 1=release at end I, 2=release at end J, 3=release at both ends (optional, default = 0)
$massDens	float	Element mass per unit length (optional: default = 0.0)
-cMass	string	To form consistent mass matrix (optional)

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

Example

The following example constructs an elastic element with tag 1 between nodes 2 and 4 with an area of 5.5, E of 100.0 and an Iz of 1e6 which uses the geometric transformation object with a tag of 9

1. Tcl Code

element elasticBeamColumn 1 2 4 5.5 100.0 1e6 9;

2. Python Code

element('elasticBeamColumn',1,2,4,5.5,100.0, 1.0e6, 9)

Code developed by: fmk