It always has a coordinate origin. Based on this, it is possible to precisely localize the objects in space according to the type of the coordinate system.
Types of Coordinate System in RFEM and RSTAB
- Cartesian (X, Y, Z): The most common CS. It is defined by three orthogonal axes that are perpendicular to each other. X, Y, Z are always the translational expansions.
- X-cylindrical (X, R, φ): In this case, you can imagine a cylinder where the height of the axis corresponds to X. The points on the cylinder are determined by the height (X‑coordinate), the radius of the cylinder (R), and the angle (φ).
- Y-cylindrical (R, Y, φ): similar to X-cylindrical.
- Z-cylindrical (R, φ, Z): similar to X-cylindrical.
- Polar (R, φ, θ): This is a spherical CS, where the node position is described by the distance to the origin (R) and the angles φ and θ.
Furthermore, there is a distinction between a global and local coordinate system. The systems described above define a global CS. Local coordinate systems are usually object-specific. In contrast to the global CS, they are marked with small letters.
Depending on stiffness, mass, and damping, structures react differently to wind action.
- How can I model a timber-concrete composite floor?
- Is it possible to parameterize models and loads with RFEM and RSTAB?
My license does not work, what can I do?
- Why is there no support force displayed even though I have modeled the member foundation?
- RFEM calculates all load combinations automatically according to the second-order analysis. Is it possible to deactivate this?
- Is it possible to change the font size of dimensions?
Which units are specified in the result display of the support reactions (kN or kN/m)? A note about this is missing in the graphic.
In the case that the support reactions are given in kN/m, for which distance does the value apply?
- I design a cross-section created in the SHAPE‑THIN program by using the RF‑STEEL EC3 add-on module, but the program shows the error message "ER006 Invalid type of c/t-part for cross-section of type General." What can I do?
- I would like to calculate a multi-span beam. Is it possible to automatically apply imposed loads by span (for the design of the largest supporting moment and moment in the span)?
- How the shear deformation of a member can be taken into account?
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
The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions