Center of Mass and Center of Rigidity

Question

Center of Mass and Center of Rigidity

Pacha Khan (Student)

(OP)

14 Apr 21 09:44

I want to analyze a 30 storied building. I have modeled it and assign all the relevant properties like loads (Vertical & Horizontal), member properties like diaphragm (Semi Rigid), checked the option of "Calculate diaphragm centers for Rigidity", etc.
but now after the analysis, the Mass in X or Y direction is Zero in tables of results. which are needed for calculating the torsional irregularity.
How can I come up with it?

https://files.engineering.com/getfile.aspx?folder=43054f0a-5e3e-4545-a29b-a

Agent666 (Structural) · Answer 1 · 2021-04-15 18:07:03

What have you defined for the mass source?

https://engineervsheep.com

Pacha Khan (Student) · Answer 2 · 2021-04-15 18:21:26

100 % dead load
25% of live load
screen shot is attached

https://files.engineering.com/getfile.aspx?folder=c0381910-52be-4b00-ade4-2

Blackstar123 (Civil/Environmental) · Answer 3 · 2021-04-16 05:56:45

Program does not calculates lumped story masses for semi rigid diaphragms. You can obtain these values by analyzing the diaphragm as rigid in a separate model however.

Pacha Khan (Student) · Answer 4 · 2021-04-16 11:22:24

RE: Center of Mass and Center of Rigidity

Pacha Khan (Student)

(OP)

16 Apr 21 11:22

Thank you...

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Center of Mass and Center of Rigidity