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FAQ 002946 EN 16 April 2019

Gerhard Rehm Modeling | Structure RFEM RSTAB

I have modeled a curved line or circle, but the axis system is different over the length or perimeter. Why is that and how can I unify the local axes?

Answer

Depending on the orientation of the lines / bars in space, the coordinate systems along the line or bar may be different. A precise definition of the alignment can be found in the link below this FAQ. To unify the coordinate system, the line or bar must have an identical bar rotation. This is only guaranteed for curved objects if they are rotated by means of an auxiliary node. For this purpose, the node number is "Inside". The layer can be set with the options "xy" and "xz".

Keywords

Align line Line rotation Staff rotation Coordinate system

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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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