Frame#
Frame elements are used to model slender structural members like beams and columns. All frame elements are constructed with the form
- Model.element(name, tag, nodes, section, transform)
Add a frame element to the model.
Available frame elements include
Name |
Description |
|---|---|
Prismatic linear-elastic frame |
|
Force formulation |
|
cubic displacment formulation |
|
geometrically exact displacement formulation |
Loads include
Theory#
A frame element represents a directed medium with a scalar characteristic coordinate \(\xi\). The embedding in space is described by:
A vector field \(\boldsymbol{x}(\xi)\) identifying positions in space,
A rotation field \(\boldsymbol{\Lambda}(\xi)\), and
A vector field \(\boldsymbol{\alpha}(\xi)\) identifying cross-sectional warping.