modal participating mass ratio have small value

[AzzA16]

Hello everyone, I need your opinion on this case.

For the modal mass participating ratio, is it okay to have UY in mode 2 to achieve a small value? In the animation, the structural movement remains translational but becomes stiffer

 

[HTURKAK]

For the modal mass participating ratio, is it okay to have UY in mode 2 to achieve a small value?

Check for vertical irregularity. Pls look The second and third columns of Table 12.3-2.