Ashutosh Sonpal's Activities

RAM SS (v15.04): Unbraced lengths for a composite backspan beam

Ashutosh Sonpal — Wed, 02 Feb 2022 17:06:38 GMT

I'm using RAMSS (v15.04) to design the backspan of a small extension type cantilever (see snip) with the "use inflection point" and "perpendicular deck bracing the top flange" settings turned on. The backspan beam is being designed as a composite beam as the cantilever is not too significant. The pre-composite stage checks seem to use the expected unbraced length upto the inflection point. However, the critical "1.4DL" combo for the composite stage seems to be using the full 30' length of the backspan as the unbraced length instead of the expected length upto the inflection point for that combo. Any reason why the program is treating the unbraced lengths under different combos differently?

Plate bucking checks for BCW single plate shear connections

Ashutosh Sonpal — Mon, 13 Dec 2021 18:21:55 GMT

It appears that RAM Connection (v13 update 4) does not check the plate buckling limit state (analogous to the coped beam web buckling check) for extended shear tab beam to column web shear connections per the provisions of chapter 9 of the AISC steel manual (14th edition) (similar to example II.A-19 of the design examples). It appears to check only the yielding of the plate per the snip of the detailed calculation below. Please find attached the RAM Connection file and snips of the limit states checked. Please review and let me know in case I'm missing something, or is it something that needs to be incorporated?

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Mon, 13 Dec 2021 00:27:33 GMT

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