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This command is used to construct a two-dimensional beam-column-joint element object. The element may be used with both two-dimensional and three-dimensional structures; however, load is transferred only in the plane of the element.
element beamColumnJoint $eleTag $Nd1 $Nd2 $Nd3 $Nd4 $Mat1 $Mat2 $Mat3 $Mat4 $Mat5 $Mat6 $Mat7 $Mat8 $Mat9 $Mat10 $Mat11 $Mat12 $Mat13 <$eleHeightFac $eleWidthFac>
$eleTag |
an integer identifying the element tag in the domain |
$Nd1,$Nd2,$Nd3,$Nd4 |
tag associated with previously defined nodes |
$Mat1 |
uniaxial material tag for left bar-slip spring at node 1 |
$Mat2 |
uniaxial material tag for right bar-slip spring at node 1 |
$Mat3 |
uniaxial material tag for interface-shear spring at node 1 |
$Mat4 |
uniaxial material tag for lower bar-slip spring at node 2 |
$Mat5 |
uniaxial material tag for upper bar-slip spring at node 2 |
$Mat6 |
uniaxial material tag for interface-shear spring at node 2 |
$Mat7 |
uniaxial material tag for left bar-slip spring at node 3 |
$Mat8 |
uniaxial material tag for right bar-slip spring at node 3 |
$Mat9 |
uniaxial material tag for interface-shear spring at node 3 |
$Mat10 |
uniaxial material tag for lower bar-slip spring at node 4 |
$Mat11 |
uniaxial material tag for upper bar-slip spring at node 4 |
$Mat12 |
uniaxial material tag for interface-shear spring at node 4 |
$Mat13 |
uniaxial material tag for shear-panel |
$eleHeightFac |
floating point value (as a ratio to the total height of the element) to be considered for determination of the distance in between the tension-compression couples (optional, default: 1.0) |
$eleWidthFac |
floating point value (as a ratio to the total width of the element) to be considered for determination of the distance in between the tension-compression couples (optional, default: 1.0) |
NOTE:
The valid queries to a BeamColumnJoint element when creating an ElementRecorder are as follows:
'internalDisplacement' - returns the displacements of the internal joint nodes.
'externalDisplacement' - returns the displacement of the external joint nodes.
'deformation' - generates a four-column matrix in which the first column is the contribution to the total joint shear deformation of all of the bar-slip components of the joint, the second is the deformation contribution of the interface shear springs, the third is the deformation contribution of the shear-panel and the fourth is the total shear deformation of the joint.
'node1BarSlipL' - returns the load-deformation response history of the Bar-Slip spring on the Left at node 1.
'node1BarSlipR' - returns the load-deformation response history of the Bar-Slip spring on the Right at node 1.
'node1InterfaceShear' - returns the load-deformation response history of the Interface-Shear spring at node 1.
'node2BarSlipB' - returns the load-deformation response history of the Bar-Slip spring on the Bottom at node 2.
'node2BarSlipT' - returns the load-deformation response history of the Bar-Slip spring on the Top at node 2.
'node2InterfaceShear' - returns the load-deformation response history of the Interface Shear spring at node 1.
'node3BarSlipL' - returns the load-deformation response history of the Bar-Slip spring on the Left at node 3.
'node3BarSlipR' - returns the load-deformation response history of the Bar-Slip spring on the Right at node 3.
'node3InterfaceShear' - returns the load-deformation response history of the Interface-Shear spring at node 3.
'node4BarSlipB' - returns the load-deformation response history of the Bar-Slip spring on the Bottom at node 4.
'node4BarSlipT' - returns the load-deformation response history of the Bar-Slip spring on the Top at node 4.
'node4InterfaceShear' - returns the load-deformation response history of the Interface Shear spring at node 4.
'shearPanel' - returns the load-deformation response history of the Shear-Panel spring.
main input file:
supporting files:
References:
Lowes, Laura N.; Mitra, Nilanjan; Altoontash, Arash A beam-column joint model for simulating the earthquake response of reinforced concrete frames PEER-2003/10 Pacific Earthquake Engineering Research Center, University of California, Berkeley 2003 59 pages (400/P33/2003-10)
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