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6.12 Imposed Nodal Deformations
An imposed nodal deformation is a displacement of a supported node, for example, due to a column settlement.
Imposed nodal deformations can only be applied to nodes that have a support in the direction of the deformation.
The number of the load is automatically assigned in the New Imposed Nodal Deformation dialog box, but it can also be changed there.
In this text box, define the numbers of the nodes on which the imposed deformation acts. You can also select them graphically by using .
If you have selected the graphical input by clicking the button, you have to enter the deformations first. After clicking [OK], you can select the relevant nodes one by one in the work window.
Imposed displacements can be applied in directions parallel to the global coordinate system. If a displacement of the supported node does not act parallel to one of the global axes, its components X, Y, and Z must be determined and entered into the corresponding text boxes.
For support rotations, imposed displacements are related to the rotated axes.
The graphic in the dialog box explains how displacements and signs are effective.
Node rotations refer to the global coordinate system XYZ as well. A skew imposed rotation requires the division in X, Y, and Z components.
A positive imposed rotation acts clockwise about the corresponding positive global axis.