When entering structural data, how can I define a plane calculation to avoid defining supports in y-direction for a two-hinged frame, for example?
The plane (2D - in XZ) or spatial (3D) model type can be set under "General Data".
You can access the "General Data" dialog box of your structure by clicking the menu "Edit" -> "Model Data" -> "General Data". It is also possible to access the general data of the structure by right-clicking "Model Data" in the Data Navigator and selecting "General Data" in the shortcut menu.
The model type can also be changed later.
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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