Regarding the other points in your posts ...
The vibration analysis in RAM Concept is based on the methods documented in the reference below:
[Willford, M.R. and Young, P., “A Design Guide for Footfall Induced Vibration of Structures”, Concrete
Centre, 2006].
The approach is heavily based in theory, but the forcing functions are based on the results of 882 measured footfalls in order to develop the design functions. The method has been validated in both laboratory and field experiments using accelerometers to measure accuracy and has been used in vibration design throughout the world for over 10 years. For the most part, the defaults used in the vibration analysis in RAM Concept are taken from typical ranges discussed in this document.
The forcing function in AISC Design Guide 11 is based on a person’s weight of 157 lb (see Section 2.2.1). The typical range for the first harmonic frequencies for a person walking is listed as 1.6-2.2 Hz (see Table 2.1).The AISC Design Guide cites a recommended damping ratio range of 0.01 to 0.05 (see Section 4.2). The lower bound value is suitable for bridges and floors with no non-structural components. The upper bound is suitable for floors with many full-height partitions. These values are taken from an earlier edition of the design guide that I have on hand. Forgive me if these have changed in a later version.
The forcing function in the Concrete Centre publication is based on a person’s weight of 200 lb. The publication cites a typical walking frequency range of 1-2.8 Hz. Their recommend design value range between 1.8%-2.5% depending on the environment (lab, office, corridor, etc). The document cites a suggested damping range of 1.5% to 2.5% for a PT slab with “low fit-out” and 2-3% for a “typical fit-out.” For reinforced concrete slabs with a typical fit-out, the tabulated typical range is 2.2-3.5%.
The recommendations in the two design guides are similar. The default values in RAM Concept are intended to fit a wide range of floors.