**Connection between a reinforced concrete column and a steel section column in Autodesk Robot Structural Analysis

[leundee]

Hello everyone,

I am currently working on a composite structure (reinforced concrete + steel) in Autodesk Robot Structural Analysis and I am facing an issue regarding how to define the connection between a reinforced concrete column and a steel column (IPE section), both connected at the same node in the model. I would like to understand how to properly model this connection in order to realistically represent the actual behavior of the joint. Would it be appropriate to consider this node as a pinned connection to simulate a non-rigid behavior, or should a fully rigid continuity be maintained between the two elements? Is there a more suitable approach, such as using releases, springs, or a specific modeling strategy for the connection? My goal is to achieve a consistent and realistic representation of this connection during the analysis phase, and to correctly generate the joint within the software. Thank you in advance for your feedback.

@Guillaume.Chazal , I have seen several of your insightful contributions regarding modeling in Robot. If you have any experience or recommendations on this type of composite connection, your input would be greatly appreciated.