Vibration analysis

[Anonymous]

Hello,

I am trying to define a footfall vibration analysis.  I need to identify:

1- 100 % DL (weight of slab, beams, structural elements modeled)

2- 80 % of SDL (imposed Superimposed Dead load)

3- 10 % live load.

I have added it under the load to mass conversion. For both SDL and LL as they are defined as loads.

My question should i add the DL component or it is already used included as a mass ?

8

[Artur.Kosakowski · Accepted solution]

Only self-weight is by default considered as mass (unless you mark disregard density in the parameters of the modal analysis) therefore you should convert other DL loads. The recommended approach is to have self-weight as  a separate load case.

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