FAQ 003347 EN
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For the automatic load case combination in RFEM and RSTAB, you have to enter the possible interaction of load cases. In addition to the simultaneous or alternative occurrence of all load cases of an action, an option for different combination conditions is possible.
Depending on stiffness, mass, and damping, structures react differently to wind action.
- I design timber components. The deformations of load combinations deviate from the manual calculation exactly by the factor of the material partial safety factor. Why?
- How can I consider loads from the self-weight as "favorable" and "unfavorable" for the combinations?
- For a specific combination rule, I would like to consider a load case with a combination coefficient that deviates from the standard. How can I proceed?
- I have created automatic load combinations according to EN 1990 + 1995 (CEN). Although Ψ2,1 = 0, there are the factors greater than zero applied for wind and snow. Is this a program error?
- I use automatic combinations, but some load cases are not used in the generated combinations. How can I change it?
- I have used the RF‑/DYNAM Pro add-on module to generate the governing result combinations of seismic loads. What is the next procedure to perform the design of the individual structural components?
- Why is it not possible to select the individually or simultaneously acting load cases in the "Combination Expressions" tab?
- There are no load case numbers (LC1, LC2, LC3, ...) but action categories (D, W, S, Imp) displayed for load combinations. Where can I set this?
- How can I consider the partial safety factor γQ,T in the automatic load combinatorics with 1.0 in compliance with DIN EN 1992‑1‑1/NA: Chapter NCI 188.8.131.52 (3) or DIN EN 1990/NA Chapter NDP A.1.3.1 (4)? The value γQ,T = 1.5 is used by default.
- How can I generate load combinations automatically in an existing file retroactively?
Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements
The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions