If a node is displaced despite a defined support, it is referred to as the imposed nodal deformation. This is the case of a column settlement, for example.
To make the imposed deformation effective at nodes, it is necessary to support the nodes in the direction of the deformation.
The imposed deformation can be defined for each of the six degrees of freedom, but only in the direction in which the node has a support.
Imposed displacements have a positive effect if pointing in the direction of the positive axes of the respective coordinate axis system. Positive imposed rotations act right-handed about the corresponding positive axis of the nodal support.
Usage in Program
In the program, the imposed deformation can be either imposed displacement or imposed rotation.
To enter the imposed displacement, it is necessary to specify the X, Y, and Z components of the displacement vector. If there is the support rotation, the components refer to the rotated support axes.
To enter the imposed rotation, it is also necessary to define the X, Y, and Z components of the rotation in relation to the coordinate system of the support.
