Does it make any difference for the calculation of a load combination if I set the calculation for the included load case according to the geometrically linear analysis or the second-order analysis?


No, this makes no difference for the calculation of the load combination. It is decisive which method of analysis is set for this load combination, see Figure 01.

Figure 01 - Method of analysis


Method of analysis Theory Order Difference Load case Load combination

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RFEM Main Program
RFEM 5.xx

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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

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RSTAB 8.xx

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The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

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