NMB31

3D Displacement Based Bernoulli Beam With $N$-$M$ Interaction Sections

• Number of Nodes: 2

• Number of DoFs: 6 (Translation, Translation, Translation, Rotation, Rotation, Rotation)

• DoF Label: U1, U2, U3, UR1, UR2, UR3

References

1. 10.1061/JSENDH.STENG-12176

Syntax

element NMB31 (1) (2) (3) (4) (5)
# (1) int, unique element tag
# (2) int, node i
# (3) int, node j
# (4) int, section tag
# (5) int, orientation tag

Remarks

1. Please check orientation for its definition.

2. Only NM3D* sections are supported. There is no validation of section attached, analysts shall make sure proper sections are used.

3. There is no information about torsion in the formulation. Thus, the local deformation only consists of five (instead of six) components. But for compatibility with general purpose beam transformation, at element, six components as usual are computed and stored, the first five are sent to section for computation of response, the torsion response is assumed to be elastic.

See SectionNM for more information about the section.

Output Type

This model supports the following additional history variables to be recorded.

variable label	physical meaning
BEAME	local element deformation
BEAMS	local element resistance

For example,

hdf5recorder (1) Element BEAME (2...)
hdf5recorder (1) Element BEAMS (2...)
# (1) int, unique recorder tag
# (2...) int, tags of elements to record

Those are local deformation and resistance (with respect to the local coordinate system) of the element.