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Valued Mentor
HoshangMustafa
Posts: 424
Registered: ‎01-06-2013

Instability in beam

116 Views, 2 Replies
10-28-2013 07:45 PM

Hi Rafal

 

Please find the attached file. Why instability occurs while beam length is 15m and the section used is HEA600. How can I get rid of this instability. I supposed HEA400 will be OK.

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Valued Mentor
HoshangMustafa
Posts: 424
Registered: ‎01-06-2013

Re: Instability in beam

10-28-2013 08:09 PM in reply to: HoshangMustafa

Hi Rafal

 

Please find the attached file. When I choose 0.9 as the coefficint of length the section will be OK. What should I add to the model so that the beam will be stable?

Please use plain text.
Product Support
Artur.Kosakowski
Posts: 5,111
Registered: ‎12-17-2010

Re: Instability in beam

10-29-2013 02:27 AM in reply to: HoshangMustafa

The steel design code usually imposes limit on slenderness of a profile which is the function of its length. If you exceed it it is reported as instable profile. In such case you should increase the size of a beam despite the fact it is already large enough for applied load (strength verification).

 

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Artur Kosakowski
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