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New and Existing Foundations in STAAD

New and Existing Foundations in STAAD

New and Existing Foundations in STAAD

(OP)
I have been asked to design a steel frame which is to be supported on new and existing pier foundations. If I know the existing pier capacity, what is the best way to model it in STAAD so that the support does not accept more load than the pier's capacity?

RE: New and Existing Foundations in STAAD

Not sure that this exists, or should exist in FEA for that matter. How are you rationalizing limiting the load on the pier? If the structure is statically indeterminate, I can see the argument that foundation failure = settlement, which lowers the stiffness of the support. Hand analysis would be the way to go in this case imo.

RE: New and Existing Foundations in STAAD

I'm not a STAAD person and since I have to make some assumptions about your layout... I don't think you need to "tell" STAAD anything about your existing pier capacity.
I think you need to create a pier layout/geometry that distributes the load in a way that limits the load on the existing piers to whatever their capacity is. Not by plugging in a max load but by creating and tweaking the geometry that leads to that condition.

RE: New and Existing Foundations in STAAD

STAAD doesn't have a clue as to the capacity of pier. Like any other FEA program, it will distribute the load according to stiffness. Sounds like you are going to need a trial and error method. (Although I am not 100% sure what this situation is.)

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