Pushover warning

[zstone]

Hi to all
During performing pushover analysis i got messagbe
THE P-M-M INTERACTION SURFACE IS NOT CONVEX
What is themeaning of this warning, and how to solve it.
Does this affect anything in pushover analysis
Regards

 

[zstone]

Well is evident that is bug in program

Because sap have release version 14.2.4 and first fixed problem is this what i post.

Significant enhancements included in SAP2000 v14.2.4:

• Concrete frame design has been enhanced to improve the smoothing of P-M-M interaction
surfaces in those rare cases where they become non-convex due to kinks in the P-M curves.

• A new design overwrite has been added for steel frame design using the "Eurocode 3-2005"
code. You may now use the "Is Rolled Section" parameter to indicate whether the member
is rolled or welded. The assignment as rolled or welded affects the b/t ratio and therefore
may affect the section classification. It may also affect the shear-area calculation.

• The limit on the number of nodes (joints) allowed for exporting a model to a SASSI file has
been increased from 9999 to 99999. The exported files are still compatible with the older format
if fewer than 10000 nodes are exported.


But when they will fix it in etabs, i dont know.

Regards
Z.G.