[Tall building with high torsion at mode shape 1 and 2]

[Hoang17520]

I'm having problems with modes 1 and 2 because they are torsional, not translation. From other questions in the forum, I should check my core and shear wall location, but the torsional value is so big that I think my building is broken, I took this construction from another company to use it as a thesis topic.

I already have mass source and rigid diagram.

The picture is showing the torsion in mode 1. The white line is the shear wall, and a core is in the middle. And I also upload my Etabs file.
My school doesn't teach me anything about etabs or this kind of thing so I'm really frustrated.

Thank you.

 

[M.IDR]

Hello Can you show the diaphragm, on Plan, also tell us about what is your mass source? Also let see what is the torsional situation like give us some value?