Hi all.
I’m trying to obtain stresses for fatigue veryfication - quad element under bending.
I made two separate load cases 7001 for my permanent loads and 7002 for permanent + cyclic loads.
I have a sheet for manual veryfication which gives me similiar results to stresses values directly from WinGraf - of course when I put the same values of reinforcement and bending moments.
And there is my problem..
When I first calculate these 7001 and 7002 LCs I get values let’s say M1 and M2. Then after (presented below) ASE run I get these M1 and M2 values rewrited with much higher values e.q. M2’ almost 2*M2.
Here is my ASE code:
+PROG ASE urs:49 $ Non-linear analysis ULS (Area elements)HEAD Non-linear analysis ULS (Area elements)
PAGE UNII 0
CTRL ITER 3
SYST PROB NONL ITER 200 TOL 0.002 NMAT YESNSTR KSV SL
REIQ LCR 1 FACT 1.0 LCRS 98 $ use reinforcement from design case 1, new reinforcement saving in design case 98
LC 7001
END
+PROG ASE urs:51.2 $ Non-linear analysis ULS (Area elements)HEAD Non-linear analysis ULS (Area elements)
PAGE UNII 0
CTRL ITER 3
SYST PROB NONL ITER 200 TOL 0.002 NMAT YESNSTR KSV SL
REIQ LCR 1 FACT 1.0 LCRS 99 $ use reinforcement from design case 1, new reinforcement saving in design case 99
LC 7002
END
Sorry for my ignorance, I know that after nonlinear analysis higher forces may occur, but could the difference be such significant?
I assume the correct approach would be to use bending moment values after NONL analysis for the manual check?
Best regards,
Szymon