Hi all,
I'm using RSA 2018 to run footfall analysis with the AISC DG11 excitation forces selected. The structure I'm checking is steel framed with some long span trusses and plate girder and its fundamental frequency is only 2.1Hz. However, after I run footfall analysis, the result shows ‘overall maximum a’ is 54mm/s2 which gives a = 0.55% g for aerobics activity. It seems small for such a low frequency structure? The input screenshot is attached. Is 'overall maximum a' given in output table equivalent to peak acceleration as per AISC DG11? Do you see anything wrong from my input file?
Thanks in advance.
