Numerical Convergence Problem in Pushover Analysis

[suusie]

Hello.

I have a problem when running static pushover analysis.

When the deformation of the building become larger and some material and element goes into inelastic range, the program stops because the tolerance of test cannot be satisfied.

I used different algorithms (Newton, NewtonLineSearch, intialNewton, KrylovNewton) and different displacement increments and a little relaxed tolerance but eventually the analysis stopped because of the convergence problem.

I used "integrator DisplacementControl $node $dof $incr"

I would like to know what else I can do to achieve successful pushover analysis to avoid numerical problem??

[ismailqeshta]

Perhaps, the tolerance value that you are using is too small.

For instance, I usually use 1.0e-6 for my models (units are in Newton and mm).