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Scale Factor on Response Spectrum Analysis

Scale Factor on Response Spectrum Analysis

Scale Factor on Response Spectrum Analysis

(OP)
I like do perform an Response Spectrum Analysis on Etabs,
I have define a Design Spectrum By EC8 - import from file case,
and i have set a scale factor value equal to 1.0,
im i correct, because the Spectrum is defined to be Design , and is input in manual way in Etabs,
I dont like to perform automatic Seismic Case, because is not includet as well in Etabs(by EC8) - I THINK SO
can anybody help me

regards
 

RE: Scale Factor on Response Spectrum Analysis

Some seismic codes require the base shear of the modal analysis to be within a certain percentage of the code calculated base shear.  This value is 80% in ASCE 7-05.  The scale factor is used to scale the calculated ETABS base shear value to at least 80% of the code value.   

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