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Vertical Acceleration During Dynamic Analysis

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saadpervez1

Civil/Environmental
Aug 27, 2014
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AE
Hi all,

When are we supposed to use vertical acceleration during say Response Spectrum Analysis?
UBC-97 has an amplification factor of 0.5CaI that needs to be added to the dead load factor during LRFD.
When using ETABS, I am confused whether we need to apply this factor if we are scaling our Response Spectrum in the UZ direction as well.
 
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