topic instability problem in rectangular steel tank design in Robot Structural Analysis Forum

instability problem in rectangular steel tank design

EnricoCorvaglia — Fri, 02 Feb 2018 08:07:50 GMT

Hello to all
Do any of you have expirience about design of an open rectangular steel tank?
I modeled a rectangular tank and designed according to Eurocode 3 and the aisc, in both cases I have a problem of instability as outlined in the attached figure.
I tried to reinforce and use different shapes (even closed shapes) but the problem persists.
Can someone help you solve it?

thank you

italo

instability problem in rectangular steel tank design

EnricoCorvaglia — Fri, 02 Feb 2018 08:10:27 GMT

thank you

Italo

Re: instability problem in rectangular steel tank design

Artur.Kosakowski — Fri, 02 Feb 2018 08:10:43 GMT

Hi @EnricoCorvaglia

If the steel profiles are welded to the tank plates shall their unrestrained buckling length be 7.5 m?

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