I have generated a load from area load on circular opening. If the radius is 1.0 m and the load is 10 kN/m², the resultant should be 31.416 kN. The recalculated load on the line should be 5.0 kN/m. However, the value of the converted load is 4,968 kN/m. Why?

Answer

The inaccuracy is caused by the fact that RFEM calculates the area of the circle approximately by dividing the boundary, that is, as a polygon. In this case, the result is 3.1214447 kN instead of 31.416 kN. On the other hand, the length of the boundary curve is calculated exactly as a circle.
If you need a graphically accurate number (that is, an image for the structural analysis), this can be solved by reducing the number of decimal places displayed.

Keywords

Load From area loads on openings

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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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