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## Robot Structural Analysis

Distinguished Contributor
Posts: 159
Registered: ‎01-29-2012

# Spectral analysis

180 Views, 3 Replies
01-17-2013 08:56 AM

In Eurocode 8 I need to combine the earthquake horizontal with the vertical (For example Y +0.30X +0.30Z). The spectrum used in x and y is different from what is used in z.

In a spectral analysis can tell you how to combine the two earthquakes spectral different?

Thanks

Andrea
Product Support
Posts: 4,019
Registered: ‎12-17-2010

# Re: Spectral analysis

01-18-2013 12:18 AM in reply to: andrea.pontiggia

In the exactly the same way. You define the X and Y cases with one spectrum and the Z with another. Then you create quadratic combination with the corresponding load factors for each of these spectral cases.

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Artur Kosakowski
Distinguished Contributor
Posts: 159
Registered: ‎01-29-2012

# Re: Spectral analysis

01-18-2013 12:47 AM in reply to: Artur.Kosakowski

In the exactly the same way. You define the X and Y cases with one spectrum and the Z with another.

OK

Then you create quadratic combination with the corresponding load factors for each of these spectral cases.

HOW DO IT?

Andrea
Product Support
Posts: 4,019
Registered: ‎12-17-2010

# Re: Spectral analysis

01-18-2013 02:13 AM in reply to: andrea.pontiggia

Then you create quadratic combination with the corresponding load factors for each of these spectral cases.

HOW DO IT?

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Spectral-analysis/m-p/3366531