RAM Shear wall (nan)

Question

Hello, When running the shear wall module. There is one section cut that pops up with -nan(ind). What would cause this problem and what are possible solutions. Thanks.

Seth Guthrie · Accepted Answer

If I convert that beam (#9, lvl 4) into a gravity beam (and a few supported members) then the problem goes away. I'm not exactly sure why the original configuration lead to a problem, but I have a theory that having a lateral, fixed-ended beam supported on the face of a wall without consideration of wall out-of-plane stiffness leads to some sort of instability and the wall forces in that level are junk as a result. The same junk demand forces are also apparent in the Ram Frame - Shear Wall Forces module by the way, and they are particular to the gravity load cases. 
 Here's my end model framing: 
 
 And the criteria I used in case it matters.

Seth Guthrie · Answer

Rerun the Ram Frame analysis for all load cases and check that you get a stable analysis (check deflected shape or reactions for example).

RAM Shear wall (nan)

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