Did you have your frequency > fn required? I think we need to have the natural frequency to be above the frequency of the activity in order to use the design guide formula.
For the transformed section - you just use the top and bottom chord of truss plus the slab with beff = min(spacing, 0.4x span length). Correct?
You use the FEM program to get the natural frequency? My first time to do this kind of vibration analysis. What size of the top and bottom chords do...
Thanks StructuralEIT - Did you use transformed moment of inertia? Just trying to figure out to calculate the composite section properties for the trusses. How did you do yours? DId you do finite element model? Thanks for your input.
I need to do vibration analysis for dancing and concert. Attached is my problem.
Structure consists of the following
- big trusses at lines A and B (L span = 6x28ft) with support at line 1 and 7.
- 7 columns at line C
- 7 lines of trusses spanning between big trusses and columns at line C
-...
