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different period and story draft using shell and membrane

thread802-143818

different period and story draft using shell and membrane

different period and story draft using shell and membrane

(OP)
I use etabs 8.5.6 to model a 35 story building. I model the slabs using shell and membrane and obtain different period.
                   torsion    x     y
shell                4.6     3.5   4.15
membrane             20.3    7.5   15.6

the drafts using membrance are much larger than using shell.

please whether it makes sense or the mode has some problem?


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