Load Combinations of Horizontal Beam-Like Structures
Tips & Tricks
In the case of horizontal beam‑like supporting structures, the favorable and unfavorable load components of the permanent actions should be considered separately. In RFEM and RSTAB, this is possible as follows.
- Create other load cases for permanent actions in addition to the “Self‑weight” load case. These include favorable load components. The automatic consideration of the self‑weight must be deactivated.
- Apply the weight of the structure and other potential structures in the relieving areas.
Important: The loads are negative, but recognized in full. The reduction follows in the load combination first. Therefore, you can use load cases for different design states (load capacity, static equilibrium).
Tip: The self‑weight can be automatically determined by the parametrized input from the cross‑section library:
GetCSPar (CrossSection(number); "g")*10
- If you want to use the “Automatic Generation from Combinations”, you have to assign the additional “permanent” load cases to a separate action category. For this purpose, there is the Category 1.C (permanent actions / imposed load). Finally, you should adjust the partial safety factors for this category. You can apply a new national annex in this case.
Note: A separate consideration of favorable permanent actions is usually not required.
- The partial safety factors result from the difference between γG,sup and γG,inf.
Do you have any questions or need advice?
Contact us via e-mail, chat or forum. Find also various suggested solutions and useful tips on our FAQ page.
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