FAQ 002784 EN

4 April 2019

Walter Fröhlich Modeling | Loading RFEM RSTAB

Why does the load generation by plane or by cells partially yield negative values in the corner points?


Although the implemented tool for generating loads may seem simple at first glance, the approach used in the background is quite complex.

So that linearly variable surface loads can also be converted into linearly variable member loads, the option Detail for the correction of generated loads "According to moment equilibrium of total loads and generated member loads" is preset.

If, for example, a rectangular cell is present, but only 3 edge members are present, then the load must be distributed so that the resulting moment from the member loads with the respective lever arms to the center of gravity of the cell is zero.
As a result, negative values are determined in the corners when the loading is positive.
If this effect is not desired, the correction of the generated load can be deactivated or set to "None." See the Manual, Section 11.8


Moment equilibrium Load generator Load generation


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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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