Joint2D Element: Difference between revisions
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This command is used to construct a two-dimensional beam-column-joint element object. The | This command is used to construct a two-dimensional beam-column-joint element object. The two dimensional beam-column joint is idealized as a parallelogram shaped shear panel with adjacent elements connected to its med-points. The midpoints of the parallelogram are referred to as external nodes. These nodes are the only analysis components that connect the joint element to the surrounding structure. | ||
{| | {| | ||
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| style="width:150px" | '''$eleTag''' || unique element object tag | | style="width:150px" | '''$eleTag''' || unique element object tag | ||
|- | |- | ||
| '''$Nd1 $Nd2 $Nd3 $Nd4''' || integer tags indicating four external nodes | | '''$Nd1 $Nd2 $Nd3 $Nd4''' || integer tags indicating four external nodes where the joint element is connected to the adjoining beam-column element | ||
|- | |- | ||
| '''$NdC''' || integer tags indicating the central node of beam-column joint (the tag is used to generate the internal node, thus, the node should not exist in the domain) | | '''$NdC''' || integer tags indicating the central node of beam-column joint (the tag is used to generate the internal node, thus, the node should not exist in the domain) | ||
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NOTES: | |||
The nodes must be located such that the main chords bisect. The node tags shall be entered in a clockwise or counter-clockwise order. | |||
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REFERENCES: | REFERENCES: | ||
Arash Altoontash, 2004, "Simulation and damage models for performance assessment of reinforced concrete beam-column joints", PhD Dissertation, Stanford University, California, USA. [http://opensees.berkeley.edu/OpenSees/doc/Altoontash_Dissertation.pdf] | |||
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Revision as of 18:33, 26 April 2011
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This command is used to construct a two-dimensional beam-column-joint element object. The two dimensional beam-column joint is idealized as a parallelogram shaped shear panel with adjacent elements connected to its med-points. The midpoints of the parallelogram are referred to as external nodes. These nodes are the only analysis components that connect the joint element to the surrounding structure.
| element Joint2D $eleTag $Nd1 $Nd2 $Nd3 $Nd4 $NdC <$Mat1 $Mat2 $Mat3 $Mat4> $MatC $LrgDspTag |
| $eleTag | unique element object tag |
| $Nd1 $Nd2 $Nd3 $Nd4 | integer tags indicating four external nodes where the joint element is connected to the adjoining beam-column element |
| $NdC | integer tags indicating the central node of beam-column joint (the tag is used to generate the internal node, thus, the node should not exist in the domain) |
| $Mat1 | uniaxial material tag for rotational spring at node 1 (optional) |
| $Mat2 | uniaxial material tag for rotational spring at node 2 (optional) |
| $Mat3 | uniaxial material tag for rotational spring at node 3 (optional) |
| $Mat4 | uniaxial material tag for rotational spring at node 4 (optional) |
| $MatC | uniaxial material tag for rotational spring of the central node |
| $LrgDspTag | tag for the large deformation condition: |
| 0 - for small deformations and constant geometry | |
| 1 - for large deformations and time varying geometry | |
| 2 - for large deformations ,time varying geometry and length correction |
NOTES:
The nodes must be located such that the main chords bisect. The node tags shall be entered in a clockwise or counter-clockwise order.
REFERENCES:
Arash Altoontash, 2004, "Simulation and damage models for performance assessment of reinforced concrete beam-column joints", PhD Dissertation, Stanford University, California, USA. [1]
Code Developed by: Nilanjan Mitra, Cal Poly