New

FAQ 003618 EN

22 January 2020

General RFEM RSTAB

Why is during the calculation always displayed that the program does a nonlinear analysis? 

Answer

Even if the program does not calculate nonlinear material it may calculate a Nonlinear algebraic equation according to II. or III. Order analysis. Therefore, the design is not only nonlinear because of geometrical material nonlinearities but also because of the nonlinear physical analysis method.
In the attached video it can be seen that if the nonlinear behavior of the tension beam is not regarded during the calculation in the load cases linear design is displayed and in the load combination nonlinear design is displayed. The reason for this is the nonlinear design according to II. Order Theory in the load combination. 

Keywords

Nonlinear Physical Geometrical

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RFEM Main Program
RFEM 5.xx

Main Program

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

Price of First License
3,540.00 USD
RSTAB Main Program
RSTAB 8.xx

Main Program

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

Price of First License
2,550.00 USD