Warning in analysis

[jackjo]

Hi everybody
I modeled a infill wall by considering the presented model by Dr. Mosalam and Dr.Gunay that exists in OpenSees page, My model is 2D and assigned it to a 2D one story frame (one bay) and units are SI. I performed pushover analysis but after running, I encountered following errors:

WARNING - ForceBeamColumn2d::update - failed to get compatible element forces & deformation for element: 2<dW: << -2.25852e-008
Domain::update - domain failed in update
DisplacementControl::newStep - model failed to updatefor new dU
StaticAnalysis::analyze<> - the integrator failed at iteration: 328 with domain at load factor 147996


Used commands related to part of analysis are:

constraints Plain
numberer Plain
system BandGeneral
test EnergyIncr 1.e-7 60
algorithm KrylovNewton
integrator DisplacementControl 4 1 0.0001
analysis Static
analyze 1000
loadConst -time 0.0

Meanwhile, I changed algorithm to common algorithms such as modified newton, newton and also increase iteration and amount of tolerance in test command, but these errors displayed again.

Please guide me to solve these errors.
Thanks so much

[jackjo]

jackjo wrote:
> Hi everybody
> I modeled a infill wall by considering the presented model by Dr. Mosalam and
> Dr.Gunay that exists in OpenSees page, My model is 2D and assigned it to a 2D one
> story frame (one bay) and units are SI. I performed pushover analysis but after
> running, I encountered following errors:
>
> WARNING - ForceBeamColumn2d::update - failed to get compatible element forces &
> deformation for element: 2<dW: << -2.25852e-008
> Domain::update - domain failed in update
> DisplacementControl::newStep - model failed to updatefor new dU
> StaticAnalysis::analyze<> - the integrator failed at iteration: 328 with domain
> at load factor 147996
>
>
> Used commands related to part of analysis are:
>
> constraints Plain
> numberer Plain
> system BandGeneral
> test EnergyIncr 1.e-7 60
> algorithm KrylovNewton
> integrator DisplacementControl 4 1 0.0001
> analysis Static
> analyze 1000
> loadConst -time 0.0
>
> Meanwhile, I changed algorithm to common algorithms such as modified newton, newton
> and also increase iteration and amount of tolerance in test command, but these errors
> displayed again.
>
> Please guide me to solve these errors.
> Thanks so much


Please give me a solution.
Thanks