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Lifting Beam design - Instability error

Offline Sriraj Varier over 6 years ago

Hello Everyone

I have been designing a lifting beam as shown in photo attached for lifting but there is some errors regarding indtability.

Could anyone please review my staad file and help me.

Thanks in Advance.Lifting Beam.std

Amitava Mon, Jan 16 2017 4:53 AM

I have just adjusted the restraints of some DoFs of this problem (added very weak spring for few or just locked some DoFs) and defined this model as a 2D problem. The modified input is attached. Please check whether this suits your intended purpose ...

LiftingBeam_Mod.std
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Offline Sriraj Varier Mon, Jan 16 2017 5:25 AM in reply to Amitava

It seems to suffice my requirement. Thank you for the help.
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Offline Sriraj Varier Tue, Jan 17 2017 1:00 AM in reply to Amitava

Please can anyone validate this staad file for the above mentioned lifting beam.

There are no errors nt can the reactions from this staad file taken for lug design.

Please advice. Thanks in Advance. Lifting beam_Mod 3 tr.std
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Amitava Tue, Jan 17 2017 1:24 AM in reply to Sriraj Varier

No instability ... Print Statics Check results are also matching.
The only support that has some valid number is FY at joint 6.
Seems ok.
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