In my model, there are members which obtain member end moments on releases despite the moment releases. How is this possible?


Please check the torsions in nodes: sometimes the members are not connected correctly at the nodal points (minimal inaccuracies) and there are two nodes very close to each other (see the figure). This results in unrealistic large torsions about the member axis, which lead to these moments.


member despite release member end release release internal forces


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