RAM Connection 13.5 Panel Zone Shear

Question

I have some steel Intermediate Moment Frames (IMF) that I'm designing the moment connection for. I've run a Smart DW connection in both version 13.4 and 13.5. Version 13.4 appears to correctly calculate the panel zone shear in accordance with AISC 341-16 Section E2.6e. Version 13.5 appears to incorrectly include the plastic moment strength of the attached beams for both IMF and SMF where it should only consider Mp for SMFs. Has this been corrected in 13.6 or 13.7 (I didn't see it listed in the resolved issues).

Seth Guthrie · Accepted Answer

I see that a couple of work items have been completed that relate to the IMF requirements (e.g. 567995 IMF Panel Zone check uses incorrect demand, same as SMF based on RBS plastic hinge rather than beam end moments). I'm not seeing the version that it was released in however. If you want to send in your file I can run it on the latest version and send back the output.

Seth Guthrie · Answer

Confirmed, we were considering Mp for IMF and SMF. The problem was fixed internally and now only SMF seismic frame use Mp. The IMF now use proper demands based on load combinations not including amplification. This is fixed and will be released in a patch in a month.

RAM Connection 13.5 Panel Zone Shear

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