Bending Moment Diagram in Staad for Seismic Load cases only

Project:www.sefindia.org
Component:Miscellaneous
Category:support request
Priority:normal
Assigned:ambrish
Status:active
Description

Dear all
A typical 3d frame was analyzed in Staad pro for seismic load case only. The application of load was by both equivalent load and response spectrum method.
The Bending moment diagram for the equivalent load method was observed to be different from that of the response spectrum method.
Why is it so?
or is there any error in my application of load.

Thanking all in advance
Ambrish