pushover convergence problem

[mehdi1995]

hi
I have a problem while performing a pushover analysis on a bridge,I have changed the analysis options several times but still I come forward to convergence problems and the analysis fails!This problem occurs when I perform a pushover analysis after a previous gravity analysis but when i do it without a gravity analysis the pushover converges but the problem is the results are way out of line!!
i have used nonlinearbeamcolumn elements with fiber section for the columns and elastic elements for the deck.
what can i do to fix the problem?
thanks

[fmk]

what do you mean when you say you have "have changed the analysis options several times "? .. do you set the optionas and go "analyze 2000 0.01" or do you have the analyze inside a while loop,
[code]
while {$ok == 0 && $currentTime < $tFinal} {
set ok [analyze 1 $dt]
if {$ok != 0} {
try something
}
if {$ok != 0} {
try somethng else
}
...
}
[/code]

[mehdi1995]

yes i used a loop like the one you wrote which was on a pushover example file!

[MOBenamer]

Hi
convergence problems result mainly because of size of time-step.
It is related to material properties (elastic modulus), so different
time steps are set for different materials in order to converge.

Mbenamer