Hi,
I'm modelling a pile cap with a group of piles using strut and tie analysis The forces from the piles are applied to the nodes which represent the pile locations while the column will be the support. All members representing struts and ties are classified as truss members. The type of support used is pinned. After running the analysis, there are warnings stating that each node has zero stiffness and also joint instability. Can the warning be ignored? Is there a practical way to make this model stable?
Thank you.