I am running an underground pipeline per CSA Z662.
Assuming I am partially restrained (Fac=0.01), per code and CII help menu the OPE allowable is S*T, AND should only be applicable if axial stress is compressive (-ve per CII output).
When I run my file, I have some bends where this seems to be the case, I am using Gr 414, and have a 414,000 allowable, and near the bend the allowable becomes '0', and axial stress is +ve. However, there are alot of nodes, mostly on straight runs, but also at other bends where the Axial stress is +ve but I am given a 414,000 allowable and overstresses. Is this an error with the CII output?
Ex. where change to 0 allowable occurs (still issue with first nodes being in tension and having an allowable.
NODE AXIAL BENDING TORSION HOOP MAX INTENS SIF in SIF out CODE STRS ALLW STRS % CODE
3128 40131 103 -0 287128 292180 1.000 1.000 297121 414000 72 Z662
3129 40131 386 0 287128 292180 1.000 1.000 297404 414000 72 Z662
3129 48339 386 -0 287128 292180 1.000 1.000 289197 414000 70 Z662
3130 48339 2246 0 287128 292180 1.000 1.000 291057 414000 70 Z662
3130 53093 2246 -0 287128 292180 1.000 1.000 5317 0 0 Z662
3131 53093 12184 0 287128 292180 1.000 1.000 15254 0 0 Z662
3131 56412 12184 -0 287128 292180 1.000 1.000 18573 0 0 Z662
3132 56412 35594 0 287128 292180 1.000 1.000 41984 0 0 Z662
Ex. where axial is in tension and having an allowable.
NODE AXIAL BENDING TORSION HOOP MAX INTENS SIF in SIF out CODE STRS ALLW STRS % CODE
2130 26239 2083 -0 287128 292180 1.000 1.000 312993 414000 76 Z662
2131 26239 11421 0 287128 292180 1.000 1.000 322331 414000 78 Z662
2131 29558 11421 -0 287128 292180 1.000 1.000 319012 414000 77 Z662
2132 29558 36817 0 287128 292180 1.000 1.000 344408 414000 83 Z662
2132 31441 36817 -0 287128 292180 1.000 1.000 342525 414000 83 Z662
2133 31441 149813 0 287128 395441 1.000 1.000 455521 414000 110 Z662
2133 32412 149813 -0 287128 394470 1.000 1.000 454550 414000 110 Z662
2134 32412 179916 0 287128 423532 1.000 1.000 484654 414000 117 Z662
Thanks.
Previous Topic
Index
