Dear Sir/Madam,
Fyi, below image is the assignation of response spectrum in Z direction
In my structure, I've purposely assigned one node (Node 9) between beam 5 & 9. (Refer to image below)
And I've modelled beam 8 without midpoint node assigned to it. (Refer to image below)
When I go to my beam result, noticed that there is Fz on beam 5 & 9 (Although beam 5 & 9 are actually one continuous beam)
and there is no Fz force on beam 8
Could anyone mind explaining it to me? Attached staad file for your reference. Thank you7356.TEST.STD
Please refer below discussion on the same topic.
Staad.PRO Seismic Response Spectrum (CQC)
Answer Verified By: Tek Ping Yong