Query on seismic base shear

[Anonymous]

Hi All,

Please find the tables from the attached file, modal analysis results are available but the reactions for Modal seismic case are not available. Im not clear where it went wrong please advice.

Regards,

Abdul Faees.

[Rafal.Gaweda]

File please.

[Anonymous]

model is posted in the below path

https://www.dropbox.com/s/0zh9d4ajsjjk80w/Atria-Bristol%20Towers-No%20results.rtd?dl=0

[Rafal.Gaweda]

I think you missed the point what is mass percentage filtering in seismic case:

http://docs.autodesk.com/RSAPRO/2014/ENU/index.html?url=filesROBOT/GUID-E12CC379-7C35-4EC2-BD49-9DF7...

You do not have any single mode with mass over 90% so no modes were considered in seismic calculations

[Anonymous]

yes solved. Thank you

[Anonymous]

Rafal,

 Please clarify me, 

1. I have converted dynamic masses only in X & Y direction - Is it ok

2. Converted cases are 1, 2, & 5, if you check the reactions of these case & the masses considered for base shear, why is the base shear value is higher??

Regards,

Abdul Faees. 

[Anonymous]

Rafal,

Please clarify me,

1. I have converted dynamic masses only in X & Y direction - Is it ok

2. Converted cases are 1, 2, & 5, if you check the reactions of these case & the masses considered for base shear, why is the base shear value is higher??

Regards,

Abdul Faees.

[Anonymous]

[Rafal.Gaweda]

1. I have converted dynamic masses only in X & Y direction - Is it ok

OK

2. Converted cases are 1, 2, & 5, if you check the reactions of these case & the masses considered for base shear, why is the base shear value is higher??

Where do you see it?

I see

case1 sum of reactions 413178,93 kN

case2 sum of reactions 280266,13 kN

case5 sum of reactions 11002,77 kN

sum total                        704447.8 kN

base shear case1116  55258.37 -> 7.8% of sum above

[Anonymous]

please see to the above post. I'm concerned about the mass conversion

[Rafal.Gaweda]

Masses considered in calculations:

[Anonymous]

 For me the vaue is different. Im using 2014 version.

[Anonymous]

No the problem is im getting a increased mass conversion of about 13%

[Rafal.Gaweda]

My file with results; in parts:
http://we.tl/wAjLC3jZHw
http://we.tl/2mLgspX6fD
http://we.tl/xiCHD4gTRK
http://we.tl/UgzWiXtFY0