Analysis Control - Response Spectrum

<Response Spectrum Analysis Control-Eigenvalue>

<Eigenvalue Tab>

It contains the same options as those in Analysis Control-Eigenvalue.

<Response Spectrum Tab>

<Response Spectrum Analysis Control-Eigenvalue>

Modal Combination Type

Set the method of combining modes in the response spectrum analysis.
 

SRSS

Square Root of Sum of the Squares
CQC

Complete Quadratic Combination
ABS

Absolute Sum