Dear,
In STAAD Non linear analysis, if Kg is unchecked, how the analysis would perform?
Regards,
The software would update the stiffness matrix based on the deformed position of the structure but would not add the geometric stiffness terms to it.
Dear Sye,
If I am right, only in Kg analysis stiffness matrix changes. In the iterative method vector matrix is the one to be updated. Correct?
I think your question is related to pdelta analysis and how the second order effects are accounted for in an iterative pdelta vs a pdelta kg analysis. In the former method, the software modifies the load vector whereas in case of the later, it modifies the stiffness.