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Floor Vibrations

Floor Vibrations

Floor Vibrations

(OP)
thread507-197395: Question on Vibrations

I have a question similar to what was spoken about in the previous thread. In AISC DG 11 there is an equation Neff (eqn. 4.7), the number of effective T-beams with three seperate criteria you have to meet in order to use Neff in the calculation of the panel (eqn 4.8). I'm in a similar situation where we have to use long girders and shorter beams for bays and the criteria for joist length^4/ joist transformed moment of inertia has failed.

I have tested this is RAM Floorvibe and you can proceed using an Neff=1. Has anyone ever investigated the use of a value above 1 but below what would be the actual value of Neff? For my situation I obtain an Neff= 2 - 2.5.

Thanks.

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