B21E
2D Displacement Based Bernoulli Beam With End Moment Release
Number of Nodes: 2
Number of DoFs: 3 (Translation, Translation, Rotation)
Syntax
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
The Lobatto integration is used by default. The number of integration points ranges from 3 to 20.
To use the corotational formulation for nonlinearity, please turn on the switch.
To release end moment at node
(2)
, use elementB21EL
in whichL
stands for low.To release end moment at node
(3)
, use elementB21EH
in whichH
stands for high.Analysts shall ensure the node with moment released must be connected to other elements that has in-plane rotational DoF.
Local iterations are performed to achieve a tolerance of
1E-13
.Since additional rotation is involved to achieve a pinned connection, visualisation is not available.
Unlike 3D beam elements, there is no need to attach an
orientation
to 2D beam elements.
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