• Controlling Fundamental Building Period

    I am running the seismic analysis for a 3 story structure and have questions about how to determine the appropriate building period to use for the seismic analysis. Gravity system is typical steel frame, with composite slab/framing at 2nd and 3rd Floors…
  • RAM Mass Participation with Ritz Vectors

    Hello, I have been trying to use the Ritz vector solution to get 90% mass participation in my model. I have noticed something I find odd, but perhaps this there is a rational explanation for this. Running 30 eigenvalue modes the mass participation in…
  • RE: Determine Building Period with Ram Elements and/or Ram Structural System

    Both programs do it. Our Dynamic analysis FAQs should get you started: RAM Elements Dynamic Modal Analysis FAQ RAM Frame - Dynamic Modal Analysis FAQ