FAQ 000303 EN

Calculation RFEM RSTAB

How are the signs of the member internal forces, for example the moments, defined in RFEM/RSTAB?

Answer

The bending moment My is positive if tensile stresses occur at the positive member face (in direction of the z-axis).

Mz is positive if compressive stresses occur at the positive member face (in direction of the y-axis).

The sign definition for torsional moments, axial forces, and shear forces conforms to the usual conventions:

These internal forces are positive if at the positive face they act in the positive direction.

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

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