Functionality - Nonlinearity
Definition, application
Behaviour of real structure is in most cases not linear, but nonlinear. In Scia Engineer it is possible to define several types of nonlinear functionalities on 1D or 2D members, supports or hinges or on whole structure and perform " Nonlinear calculation".
Where to find in ESA
All non-linear functionalities are visible in Project data dialog in section Functionality.
Overview of nonlinear functionalities
| Functionality | Basic description |
| "Beam local nonlinearity" |
If this option is ON, functions for non-linear analysis of 1D members are available (e.g. 1D member acting only under tension, compression, limit force, gap etc. may be analysed). |
| "Support nonlinearity/Basic soil spring" |
If this option is ON, functions for non-linear analysis of supports are available. |
| " Initial imperfections" |
If this option is ON, functions for introduction of initial deformations before calculation are available. |
| "Geometrical nonlinearity" |
If this option is ON, functions for geometrically non-linear calculation are available. |
| "General plasticity" |
General plastic analysis of 2D members; several material models are available, such as Tresca, Von Mises, Mohr-Coulomb, Drucker-Prager. |
| "Compression-only 2D members" |
Masonry or plain concrete walls and similar structural elements can be analysed using this option. |
| " Design of cable members" | Specific 1D member nonlinearity for the analysis of cables; combines the behaviours tension only, no bending stiffness, initial stress and initial curved geometry |
| " Friction support" | If ON, friction supports may be defined in the model, as well as advanced line soil springs |
| "Membrane elements" | Thin plates can be calculated as membranes. |
| "Sequential analysis" |
Two types of calculation can be combined in one analysis. |