posttensioned steel frame analysis

[mijin]

hi,
I have a model about selfcentering connection in steel frame.
When I run transient analysis with elastic beam, column, tendons and nonlinear gap opening & energy dissipator,
it worked..
but when I change elastic beam to nonlinear beam element ( Dispbeam, beamwithHingemodel etc)
it didn't work. specifically when time step was 5~ 6, it failed to converge.
What can I do? I don't know why it failed..

[fmk]

well perhaps the section are incorrectly defined .. try replacing thefibersection with an elastic section and obtaining results, thenr eplace with your fibersection but with elastic materials and get some results. compare the two. if same the discretization is correct possibly material defintion error or your section cannot deal withthe section forces .. compute max section forces from end forces using equilibrium to seethe mag.

[mijin]

Thanx. I solved it!

[rejina]

Dear mijin,
Can you tell me what kind of material you used for modelling the post-tensioned tendons? My model is showing convergence issues for which I am unknown. Please help me to solve the issues.