Creating constraints and BC in a node

[gabrian]

Hello,

I have a steel frame for which I am running a Response spectrum analysis. I would like to impose that no elongation is present in the beam using a coupling constraint, but at the same time a boundary condition is defined in the nodes preventing the vertical displacement. Can you please tell me how to properly do this, as I get an error:
Whenever a translation (rotation) dof at a node is constrained by a kinematic coupling definition the translation (rotation) dofs for that node cannot be included in any other constraint including mpcs, rigid bodies, etc.

 

[Mustaine3]

Apply the BC for the vertical displacement also on the ref node of the coupling and not the element nodes.
Or deactivate that DOF within the coupling.

 

[gabrian]

I cannot apply the BC on a reference point if that is what you meant. How should I deactivate the DOF more exactly?

 

[gabrian]

Could someone help me with applying the Boundary conditions and a constraint in the same node? Has anybody experienced any problems with this?

 

[gabrian]

So there is no possible way to constrain two nodes and have a BC in one of them?