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SUPPORT CONDITION

 
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shri shanmuga nandini A
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Joined: 21 Nov 2022
Posts: 1

PostPosted: Mon Nov 21, 2022 12:30 pm    Post subject: SUPPORT CONDITION Reply with quote

what support should we assign for  UC Column base support in staad pro? when we have to consider fixed, pinned and fixed but (release moment in one direction )?
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vikram.jeet
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Joined: 26 Jan 2003
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PostPosted: Tue Nov 22, 2022 3:51 am    Post subject: Reply with quote

Not clear on what UC  represents -

Column of buildings

Support Condition :
If strata Rocky, Hard  soil  -take Fixed

Medium or soft strata  -  hinged  is appropriate for gravity loading , but in  eartquake  fixity is available , in software it is not possible to include separate conditions,, hence fixed can be adopted..

For single col masts and towers - Fixed irrespective  of strata

Gravity loading moments at base are result of compatibility, and even slight rotation due to weak strata, cause this moment to cease.


However for equilibrium moments caused by wind EQ, especially on single column masts, there is no escape as str stability depend totally on this moment to be resisted.
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satishkemkar
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Joined: 23 Nov 2012
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PostPosted: Tue Nov 22, 2022 6:49 am    Post subject: Reply with quote

UC represents universal column steel according to British standard
In staad , option "Fixed But " is available where you can release moment or force according to your choice

Thanks

Satish
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