How can we improve behavior of nonlinear beam column?

[semon]

Hi Everyone,

I am working on a bridge model with contact element to simulate the abutment and deck interaction. The model runs well without contact element and shows some errors while running the model with contact element. The model cannot converge with the contact element, I think it is due to non-convergence of nonlinear beam column element. How can I improve the behavior of the nonlinear beam column?

The error that shows up while running the model is as follows:

WARNING - ForceBeamColumn3d::update - failed to get compatible element forces & deformations for element: 52(dW: << 0.00542727, dW0: 27.7979)
Domain::update - domain failed in update
Newmark::update() - failed to update the domain
WARNING NewtonRaphson::solveCurrentStep() -the Integrator failed in update()
DirectIntegrationAnalysis::analyze() - the Algorithm failed at time 7.38
OpenSees > analyze failed, returned: -3 error flag
WARNING - ForceBeamColumn3d::update - failed to get compatible element forces & deformations for element: 52(dW: << 0.00542727, dW0: 27.7979)
Domain::update - domain failed in update
Newmark::update() - failed to update the domain
WARNING NewtonRaphson::solveCurrentStep() -the Integrator failed in update()
DirectIntegrationAnalysis::analyze() - the Algorithm failed at time 7.38
OpenSees > analyze failed, returned: -3 error flag
CTestNormDispIncr::test() - iteration: 1 current Norm: 0.629986 (max: 0.1, Norm deltaR: 134162)
CTestNormDispIncr::test() - iteration: 2 current Norm: 0.000515823 (max: 0.1, Norm deltaR: 134152)

-------------------------Bar failed---------------------------
-------------------------Bar failed---------------------------
-------------------------Bar failed---------------------------
WARNING - ForceBeamColumn3d::update - failed to get compatible element forces & deformations for element: 53(dW: << 0.000689981, dW0: 44.3896)
Domain::update - domain failed in update
Newmark::update() - failed to update the domain

Thank you,
Semon

[gerber]

Try to change the iteration of the nlbeam-column element . The default value is 10^-16 , its too high !!!

[semon]

Hi
Hi all,

I decreased and increased the default test tolerance of the element, 52, which failed to converge and it did make any difference in the model. It shows same kind of error in same time. Do I have to change the tolerance in every elements.

The strange part is that the model runs perfectly for other three inputs except the fourth one and all three earthquake loading have 25 inch of maximum displacement.

Thanks