I need help desperately

[borjiajia]

I model a simply supported reinforced beam, using nonlinearbeamcolumn, fiber section, concrete02,steel02, 3 nodes named 1,3,5. applying vertical concentrating force to node 3.
I want it to be displacement control. But after many times of testing, the result is always null. Please help me with my analysis part~~
Is there any fatal wrong in the analysis part?

#-gravity load-------------------------------------------------------------------------------------------------------------------
set p1 -2.6e3;
pattern Plain 101 Linear {
eleLoad -ele 11 12 -type -beamUniform $p1;
}

#pattern Plain 1 Linear {
# load 1 0.0 -4160 2220
# load 5 0.0 -4160 2220
#}

puts "ok4"
set Tol 1.0e-6;
constraints Transformation;
numberer RCM;
system BandGeneral ;
test NormDispIncr $Tol 6 ;
algorithm Newton;
set NstepGravity 10;
set DGravity [expr 1./$NstepGravity];
integrator LoadControl $DGravity;
analysis Static;
analyze $NstepGravity;
loadConst -time 0.0
puts "Model Built"

#-------------------------------------------------------------------------------------------------------------------------------
#---pushover analysis part--------------------------------------------------------------------------------------------------
set P2 -400e3;
set IDctrlNode 3;
set IDctrlDOF 2;
set Dmax [expr 0.2];
set Dincr [expr 0.0001];
#

# create load pattern for lateral pushover load
pattern Plain 102 Linear {
load 3 0.0 $P2 0.0;
}

integrator DisplacementControl $IDctrlNode $IDctrlDOF $Dincr;
set Nsteps [expr int($Dmax/$Dincr)];
analysis Static;
analyze $Nsteps;
puts "Pushover complete";
#----------------------------------------------------------------------------------------------------------------------

Really need your help~~Thank you so much~~

[vesna]

Your analysis objects look good.

Try doing gravity analysis only and post the message you get on the terminal.