Is there a way to define rotational springs and horizontal translation springs as a boundary condition.
A similar question was also posted in our forum in the past: https://communities.bentley.com/products/geotech-analysis/f/plaxis-soilvision-forum/197008/point-rotation-fixity-in-plaxis-3d
Depending on the application, you can use a rigid body which allows for defining conditions such as Force condition (force or moment) or Displacement condition (displacement or rotation). For more information, please check our Reference manual.
The prescribed displacement can also be used for the case of a displacement condition, however, it does not support the definition of a rotation.