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#27169 - 05/05/09 08:12 AM B31.3 Sustained SIF Multiplier
Flames Offline
Member

Registered: 03/06/09
Posts: 17
Loc: Connecticut, US
B31.3 Code Interpretation 1-34 dated February 23, 1981 File: 1470-1 states that for sustained and occasional loads an SIF of 0.75i, but not less than 1.0 may be used. This setup directive allows the user to enter their coefficient. The default is 1.0. To comply with this interpretation the user would enter 0.75. B31.3 Code Interpretation 6-03 dated December 14, 1987 permitted users to ignore the stress intensification for sustained and occasional loads. To comply with this interpretation, the user would enter 0.0.

This confuses me. Could any one explain me why it should be 1 or whatever? What is the correct practise to use.

Thanks,

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#27179 - 05/05/09 12:12 PM Re: B31.3 Sustained SIF Multiplier [Re: Flames]
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
This topic has been previously discussed. Searching for "+sustain" and "+multiplier" yields the following posts:

http://www.coade.com/ubbthreads/ubbthrea...=true#Post16421

http://www.coade.com/ubbthreads/ubbthrea...=true#Post15905
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Regards,
Richard Ay - Consultant

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#27180 - 05/05/09 12:13 PM Re: B31.3 Sustained SIF Multiplier [Re: Richard Ay]
SUPERPIPER Offline
Member

Registered: 08/13/03
Posts: 405
Loc: Europe
*shudder*
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Best Regards


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#27187 - 05/05/09 04:13 PM Re: B31.3 Sustained SIF Multiplier [Re: Flames]
Dave Diehl Offline
Member

Registered: 12/14/99
Posts: 2382
Loc: Houston, TX, USA
I would use Code Case 178. (It's in CAESAR II Version 5.10.)
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Dave Diehl

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#27271 - 05/07/09 07:08 PM Re: B31.3 Sustained SIF Multiplier [Re: Flames]
bom Offline
Member

Registered: 06/23/07
Posts: 285
Loc: Manila, Philippines
Hi,

I advice you look for SIF discussion and how it is treated in the system analysis. Look for Sir Breen Breen Dropings.. It will help a lot.


Regards,
_________________________
BOM

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