Error with case analysis: Dead load

Forum for OpenSees users to post questions, comments, etc. on the use of the OpenSees interpreter, OpenSees.exe

Moderators: silvia, selimgunay, Moderators

Post Reply
tuanrlc
Posts: 9
Joined: Fri Jul 22, 2016 8:13 pm
Location: Kunsan National University, South Korea

Error with case analysis: Dead load

Post by tuanrlc » Fri Nov 03, 2017 9:46 pm

Can anyone help to solve the following problem?
I use the fiber section (annular section) for nonlinearBeamColumn element.

And I define analysis option for dead load as below:

constraints Plain
numberer Plain
system UmfPack -lvalueFact 40
test NormDispIncr +1.000000E-12 25 0 2
algorithm Newton
integrator LoadControl +1.000000E+00 4 +1.000000E-03 +1.000000E+00
analysis Static;

But when I run, the below error occurs

WARNING: CTestNormDispIncr::test() - failed to converge
after: 25 iterations current Norm: 31.4213 (max: 1e-012, Norm deltaR: 5.79451e+012)
NewtnRaphson::solveCurrentStep() -the ConvergenceTest object failed in test()
StaticAnalysis::analyze() - the Algorithm failed at iteration: 0 with domain at load factor 1

Note: In case of Transient Analysis with annular section, the result is ok.
And In case of Dead Analysis with general section and forcebeamcolumn element, the result is ok also.

Thanks advance!

EricsonEncinaZ
Posts: 108
Joined: Mon Sep 16, 2013 1:14 pm
Location: University of Auckland

Re: Error with case analysis: Dead load

Post by EricsonEncinaZ » Sun Nov 05, 2017 10:54 pm

Adaptive solution to handle non-convergence: http://opensees.berkeley.edu/community/ ... =2&t=64416

tuanrlc
Posts: 9
Joined: Fri Jul 22, 2016 8:13 pm
Location: Kunsan National University, South Korea

Re: Error with case analysis: Dead load

Post by tuanrlc » Mon Nov 06, 2017 11:10 pm

Thanks for your response, EricsonEncinaZ

In my cases, I need a solution for Dead analysis.

The Dynamic analysis worked already.

Post Reply