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Active Contributor
MARIOS75
Posts: 26
Registered: ‎01-04-2010

Re: Seismic Vs Spectral

03-10-2012 12:16 AM in reply to: Artur.Kosakowski

You are right about the CQC rule, i missed the fact that it's damping dependant.

Thank you.

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Active Contributor
alb2
Posts: 47
Registered: ‎05-14-2012

Re: Seismic Vs Spectral

06-08-2012 12:27 AM in reply to: Artur.Kosakowski

Hi,

can you please explain ( maybe in a simple example) the last question

 

I need to do an initial run, then go back and do a second iteration to apply scaling factors to limit my base shear to the expected value.

 

I am new to spectral analysis, and I dont understand in the second interation how can I apply the  scaling factors and how to get this factors?

 

Thank you

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Artur.Kosakowski
Posts: 4,597
Registered: ‎12-17-2010

Re: Seismic Vs Spectral

06-08-2012 12:57 AM in reply to: alb2

You can check the sum of reactions and compare it to the targeted value. This will give you the required scaling factor. Then you can e.g. use the corresponding load factor for given seismic spectral case.



Artur Kosakowski
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Valued Mentor
tony.ridley
Posts: 652
Registered: ‎09-07-2011

Re: Seismic Vs Spectral

06-10-2012 02:48 AM in reply to: Artur.Kosakowski

That is, check the sum of reactions for the dominant mode in each direction. (not the CQC combo)...

 

Tony

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