Vibration analysis in Ram Concept

Hi all,

I have two questions about vibration analysis using RAM Concept.

1. How can I know whether the vibration analysis is performed on a "cracked" or "uncracked" models. And also, do I have control over that? I ask this question because I am doing a  series of vibration analyses on different type of floor systems:
   • For composite steel/concrete floors, I convert the steel sections in the composite slab to an equivalent concrete beam, but need to make sure that the vibration analysis is performed on the uncracked sections.
   • For reinforced concrete slabs I want to performed the vibration analysis on the cracked sections under service load case.
2. I understand that the vibration analysis is RAM Concept is primarily performed by using a series of harmonic functions to represent human walking. I want to know if alternative/user-defined time-histories can be used for the analysis? For examples, I would like to model the impact of a car/truck passing over a speed bump, which requires a different time-history of the load.

Thanks a lot for your assistance.

Regards,

Ash