Rotated Nodal Support: Display and Results in Printout Report

Tips & Tricks

Nodal supports are usually defined with regard to the global axis system. However, it is sometimes necessary to rotate the nodal support. For example, for floor slab with a pile foundation. For geological reasons, the piles do not rest in the ground vertically, but in an inclined position. Each end point of the piles has a nodal support, which can only absorb forces along the pile foundation direction. Therefore, rotation of the nodal support is required. Various options for this are described in the previous posts.

RFEM and RSTAB provide different display options for support forces. You can select ‘Local’ (relating to the local axis system of the support) and ‘Global’ (relating to the global axis system). In this case, you should use the local reference, otherwise the support force will be converted to all three global axes due to the support rotation. Also, your selection of the result display affects the printout report, which shows the support forces according to the selected option.

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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

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