02. Why the max range is shown as TR: T1 to T7, but the code stress for T2 to T7 is larger in AutoPI


Applies To
Product(s):AutoPIPE
Version(s):ALL;
Environment: N/A
Area: Settings
Original Author:Bentley Technical Support Group
Date Logged
& Current Version
Jan. 2017
10.01.00.09

Problem:

Why the max range is shown as TR: T1 to T7, but the code stress for T2 to T7 is larger?

Why is this?

Solution:

Current implementation of the program (AutoPIPE V8i 09.06.01.xx and lower) is to only check for a range which results in maximum resultant moment.  This is done before the program goes in to detailed calculations (cross sectional area, section modulus are not know at this point). Different codes may have different requirements like B31.1 does not consider axial stress, whereas B31.3 considers it differently incorporating bending, torsional and axial stresses.

As such, the following enhancements have been logged:

TFS-E126888: Add details to online help regarding selection of Max Range load cases

TFS-E126889: Consider axial force in selection of load pair for Max Range combination

Note:

Max range will not range thermal cases across multiple analysis sets. Only analysis sets with multiple thermal cases in them will be ranged and the Max range of those thermal cases printed in the results. 

See Also

"Include Max Range comb" setting

Bentley AutoPIPE