Hello, I hope you are very well.1. Why when I make models with walls (modeled with plates) and I do a spectral modal analysis with the IS1893 2002 standard, the participating mass of the modes does not reach 90% quickly, I have to place about 200 modes to reach it.
2. It is necessary to declare the seismic mass in the 3 directions (x,y,z), what happens if I only do it in X and Z?
3. When I want to use the option to ignore the participating mass of the % modes, I put values but it only leaves me a single mode, I think I don't know how to use it or this option doesn't work correctly.
Can you please attach the model?