#27376 - 05/12/09 07:41 AM
Caesar Max Method
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Member
Registered: 12/26/07
Posts: 266
Loc: india
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Dear all,
In the below cases, how i evaluated by using Caesar Max Method
CASE TYPE Method U1+U2+U3 SUS ALG U1+U2-U3 SUS ALG U1-U2+U3 SUS ALG U1-U2-U3 SUS ALG Thanks,
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#27385 - 05/12/09 11:16 AM
Re: Caesar Max Method
[Re: Shabeer]
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Member
Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
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Assuming you had this:
L1 = U1+U2+U3 SUS ALG L2 = U1+U2-U3 SUS ALG L3 = U1-U2+U3 SUS ALG L4 = U1-U2-U3 SUS ALG
then you could do this:
L5 = L1, L2, L3, L4 SUS MAX
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Regards, Richard Ay - Consultant
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#27389 - 05/12/09 01:31 PM
Re: Caesar Max Method
[Re: Richard Ay]
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Member
Registered: 12/26/07
Posts: 266
Loc: india
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Thanks richard Ay
In my combination i considered
Assume L10=w+p1+ max of above case.
how i include that cases and which is max of above the case.
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#27400 - 05/12/09 09:00 PM
Re: Caesar Max Method
[Re: Shabeer]
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Member
Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
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No, you can't do that. The idea of the "MAX" case is to report the maximum of the listed cases. You can't do any further combintations using the "MAX" case.
_________________________
Regards, Richard Ay - Consultant
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#27423 - 05/13/09 06:56 AM
Re: Caesar Max Method
[Re: Richard Ay]
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Member
Registered: 04/24/08
Posts: 12
Loc: asia
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L1 = U1+U2+U3 SUS ALG L2 = U1+U2-U3 SUS ALG L3 = U1-U2+U3 SUS ALG L4 = U1-U2-U3 SUS ALG L5 = L1, L2, L3, L4 SUS MAX L6 = W + P1 L7 = L5 + L6
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#27427 - 05/13/09 07:14 AM
Re: Caesar Max Method
[Re: jane_k]
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Member
Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
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Jane,
Your case (7) can yield misleading results depending on the combination method and "what gets computed" versus "what gets directly summed". Your suggestion may work, but only because cases 1 - 4 are uniform loads and don't have a weight or pressure component.
Just be really, really careful with this.
_________________________
Regards, Richard Ay - Consultant
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#27430 - 05/13/09 08:22 AM
Re: Caesar Max Method
[Re: jane_k]
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Member
Registered: 12/14/99
Posts: 2382
Loc: Houston, TX, USA
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In CAESAR II, basic load cases must be computed before combinations.
I suggest replacing:
L1 = U1+U2+U3 SUS ALG L2 = U1+U2-U3 SUS ALG L3 = U1-U2+U3 SUS ALG L4 = U1-U2-U3 SUS ALG L5 = L1, L2, L3, L4 SUS MAX L6 = W + P1 L7 = L5 + L6
with:
L1 = U1+U2+U3 (OCC) ALG L2 = U1+U2-U3 (OCC) ALG L3 = U1-U2+U3 (OCC) ALG L4 = U1-U2-U3 (OCC) ALG L5 = W+P1 (SUS) ALG L6 = L1, L2, L3, L4 (OCC) MAX L7 = L5 + L6 (OCC)
I've also changed those SUS loads to OCC loads. Perhaps those aren't occasional loads but if they are, they should be so noted.
And what about the -U1 permutations?
Edited by Dave Diehl (05/13/09 08:34 AM)
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Dave Diehl
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#27447 - 05/14/09 03:17 AM
Re: Caesar Max Method
[Re: Dave Diehl]
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Member
Registered: 12/26/07
Posts: 266
Loc: india
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hai dave diehl & richard Its case for loyd's comments, my cases only for sustain. i follow case L7 = L5 + L6. thanks richard and dave.
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#27454 - 05/14/09 07:36 AM
Re: Caesar Max Method
[Re: Shabeer]
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Member
Registered: 04/24/08
Posts: 12
Loc: asia
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lesson learned. =) thanks richard and dave.
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#27501 - 05/17/09 11:48 PM
Re: Caesar Max Method
[Re: jane_k]
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Member
Registered: 12/26/07
Posts: 266
Loc: india
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Dear all,
wht is difference between alg, abs and max. explain in brief? i go through coade help, i can't understand. why we using that method? what purpose of using that case?
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#27506 - 05/18/09 07:14 AM
Re: Caesar Max Method
[Re: Shabeer]
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Member
Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
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Take two numbers, 125 and -218, then:
An algebraic combination would yield (125 + -218) = -93 ) An absolute combination would yield ( abs(125) + abs(-218) = 343 ) A max combination would yield (-218) A signed max combination would yield (125) A signed min combination would yield (-218)
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Regards, Richard Ay - Consultant
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