Behind this analysis is the general superposition principle. It is based on the superimposition of equal physical quantities with a linear relation between the action and the superimposed quantity.
To visualise the results, a super combination extends this law in the area of technical mechanics to construction stages. In structural mechanics, a construction stage is a static structure with a definite configuration of structural elements. If this configuration of the supporting elements in the supporting structure (angle, length, shape, and so on) is changeable, the construction stage is present. For these cases, a super combination superimposes several results of construction stages determined linear-elastically with different configurations of supporting elements and represents them as envelopes on a model with any configuration.
Typical Application Areas
- Photovoltaic systems with hydraulic module orientation
- Beam models with temporary support elements during the assembly
Entering in RSTAB
Supercombinations can be created in RSTAB in the Data navigator under 'Load Cases and Combinations' → 'Super Combinations' by using the load situations from several model files of a similar structure, which has different configurations.
Arbitrary point load distributions often occur in the load definition of member structures.
The material model Orthotropic Masonry 2D is an elastoplastic model that additionally allows softening of the material, which can be different in the local x- and y-direction of a surface. The material model is suitable for (unreinforced) masonry walls with in-plane loads.
- Are the effective length coefficients in the add-on modules for the aluminum and steel design automatically determined from the model or do I have to make adjustments?
Which units are specified in the result display of the support reactions (kN or kN/m)? A note about this is missing in the graphic.
In the case that the support reactions are given in kN/m, for which distance does the value apply?
- I design a cross-section created in the SHAPE‑THIN program by using the RF‑STEEL EC3 add-on module, but the program shows the error message "ER006 Invalid type of c/t-part for cross-section of type General." What can I do?
Is it possible to specify shrinkage effects as loads?
Is it possible to calculate American steel cross-sections?
- Where do I find the setting to specify the entered structural component as a "wall" or "slab"?
- The four plates, identically loaded, show different negative moments at the point of support. Is this a mistake?
- How can I quickly model a chimney with reinforcement rings and stiffeners?
- The protocol lacks information on the limit time for the assessment of fire resistance R in the RF-TIMBER Pro add-on module. Can this information be added to the report?
- How can I model and design general bolted connections with the surface and solid elements in RFEM?
The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions
Superpositioning results of different construction stages with varying structural and loading conditions