Hey I am making a simple Primary-Secondary Beam Structure with columns and cant figure out the correct joint and support conditions. I have attached my definition if anyone could have a quick look I would massively appreciate it.
Jack.
Baseline.gh (58.4 KB)
Hello,
for a start consider disabling all “custom” joints components and set all dofs at all supports to have zero displacement and zero rotation. Karamba will then create a moment stiff structure which can be analyzed with the setup provided. After that configure a single joint (with various dof releases) between one secondary and primary beam where the column is not involved and check the response. Move on to the other side of the secondary beam connection and apply a joint in simliar fashion. Use a simliar approach for the next key joint etc.
Thanks for this Martin, I appreciate it.
Hey Mads, I appreciate your help but im still extremely confused regarding this. I want each member to be simply supported. I have uploaded a revised definition here and am hoping matthew or clemens might see this at some point. @matttam
Baseline.gh (63.7 KB)
here is a solution simple connections.
Baseline_mme_01.gh (62.1 KB)
Hey Mads,
I appreciate you taking your time to help. Is it necessary for me to split the primary beam into two seperate elements (12 total currently) as I have done in order to define the joint with the secondary beam. Or is it possible to have it as 6 primary beams? I would like to refine it back to 6 for the member sizing part if possible.
Jack.
For the FEA to work there must be a node if interaction between the primary and secondary beam is required. Discretizing the primary beam will not affect any cross section optimization as long as these discretized beam elements are rigidly connected (default in Karamba). As for the length sizing and the final choice of the section profile, that requires some postprocessing in GH.
Ok perfect, makes sense. Thanks for all your help Mads this has been extremely helpful.
