In E1 modal analysis, mod-0 period is 4sec.

G

gyatko

New Member
Hello, Friends, E1 modal analysis mod-0 period is 4 seconds in Hollow System Structure, I found the reason somehow, I would be very happy if you could help me.
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Hi, -Your project has two separated blocks including base. Solve them in separate project files. You must separate the blocks so that the curtain rollover controls can be performed correctly on both blocks. - In the block on the right, you have defined the 180cm basement curtains within the floor. It would be more appropriate to define this 180cm part as a separate rigid floor. -P72 and P73 Curtains are stuck in the air because their jeans are defined incorrectly, they do not descend to the foundation. Change their jeans to -180cm. The period is 4sec, because there is a connection problem in the rib beam bar element due to the overlap of the rib beam with the main beam. I have attached the corrected model.
 
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