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B21E

2D Displacement Based Bernoulli Beam With End Moment Release

  • Number of Nodes: 2
  • Number of DoFs: 3 (Translation, Translation, Rotation)
  • DoF Label: U1, U2, UR3

Syntax

Text Only
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element B21EL (1) (2) (3) (4) [5] [6]
element B21EH (1) (2) (3) (4) [5] [6]
# (1) int, unique element tag
# (2) int, node i
# (3) int, node j
# (4) int, section tag
# [5] int, number of integration points, default: 6
# [6] bool string, nonlinear geometry switch, default: false

Remarks

  1. The Lobatto integration is used by default. The number of integration points ranges from 3 to 20.
  2. To use the corotational formulation for nonlinearity, please turn on the switch.
  3. To release end moment at node (2), use element B21EL in which L stands for low.
  4. To release end moment at node (3), use element B21EH in which H stands for high.
  5. Analysts shall ensure the node with moment released must be connected to other elements that has in-plane rotational DoF.
  6. Local iterations are performed to achieve a tolerance of 1E-13.
  7. Since additional rotation is involved to achieve a pinned connection, visualisation is not available.
  8. Unlike 3D beam elements, there is no need to attach an orientation to 2D beam elements.