Active Topics | Active Posts | Unanswered Posts Past 24 hours | Past 48 hours | Past 7 days
Forum   Subject
CAESAR II
Jump to new posts Re: thrust load on Expansion joint by Michael_Fletcher @ Today at 12:27 PM

Here's an analogy: Take a vertical pipe in CAESAR. Anchor at the bottom, free at the top. Apply a horizontal displacement at the top node of L. Run and calculate the model. You have a force and a displacement, therefore, you have a stiffness of F/L.
CAESAR II
Jump to new posts Re: thrust load on Expansion joint by amemar @ Today at 11:11 AM

It's funny to know that I contacted two manufactures we used to work with and both said the data in their catalogs are either outdated or not valid and they need to know the movements in order to give the correct stiffness!
CAESAR II
Jump to new posts Re: GRP line: sif in "pipe to pipe" by Michael_Fletcher @ Today at 10:30 AM

You may need to reach out to the piping manufacturer for guidance, which they may be prepared to not deliver to you an answer. If such is the case, it should be on you to "strongly recommend" to not circumvent engineered components as it encumbers y
CAESAR II
Jump to new posts Re: thrust load on Expansion joint by Michael_Fletcher @ Today at 09:37 AM

Amemar, Anytime a manufacturer gives you a value for their product to use in your analysis, use it, unless you have reason to doubt their claim. You can use the stiffnesses from the application guide (or the expansion joint modeler in CAESAR) when
CADWorx Plant
"Bolt component with selection code (null) was not found in specification..." anyone else having these issues? Bolts are a constant ongoing problem here. *edit spec issue here fixed it
CADWorx ISOGEN
Jump to new posts Re: Dynamic Naming Weld Prefix by naeilers @ Yesterday at 12:54 PM

Did you ever get this to work? Interested as well.
CAESAR II
Jump to new posts Re: Mistake in max stress from expansion casses by Ahmed_Kamal @ Yesterday at 02:15 AM

Hello Richard , Thank you for your reply I did some modification to keep the stress within allowable in max case but you can easily notice that the stress in this case is much higher than other cases. I notice that it take the lowest allowable stress
CAESAR II
Jump to new posts Re: Mistake in max stress from expansion casses by Richard Ay @ 01/16/19 04:11 PM

Could you send us your job?
CAESAR II
Jump to new posts Re: Restraint Loads during Sustain Case by Michael_Fletcher @ 01/16/19 02:43 PM

I suggest providing something that we can look at. But here are two stabs in the dark. If a pipe span has sufficient sag, it will draw the ends, though I'm given to understand CAESAR does not consider this case. If a pipe is able to rotate about a
CAESAR II
Jump to new posts Re: Restraint Loads during Sustain Case by Dave Diehl @ 01/16/19 02:37 PM

If this is a B31.3 analysis, is it "sustained" or "alternate sustained"? I agree that the weight analysis usually does load up non-weight-carrying line stops. (I assume you are not providing this stop on a vertical run of pipe.)
CAESAR II
Jump to new posts Restraint Loads during Sustain Case by mechengcalcan @ 01/16/19 12:31 PM

Hi, Could anyone explain the possible sources of axial restraint load at a line stop on a pipe rack during a sustain case? I am getting a result that during operation case (temp @93 deg) axial load @ line stop is about 90 kN where at sustain case,
CAESAR II
Jump to new posts CAESAR II 2019 Beta is Available by StephDonovan @ 01/16/19 12:06 PM

CAESAR II 2019 (v 11) Beta Program is now LIVE!!! To participate register at: CAESAR II 2019 Beta Participants must be current on maintenance. Current licensing is used for the Beta and the Install/Serial Number will be provided. The Beta
CAESAR II
Jump to new posts Re: thrust load on Expansion joint by amemar @ 01/16/19 10:56 AM

Michael, Thanks for your reply . I moved the Exj to horizontal and added two spring hanger . I used tied Exj so I modeled simple model expansion joint. Loads on pump are within the limit. However I have one question: As per CAESAR II application g
CAESAR II
Jump to new posts Re: expansion joint weight by Dave Diehl @ 01/16/19 08:28 AM

The expansion joint element, in CAESAR II, is weightless. I suggest you apply added assembly weight to the (rigid) elements on either end of the joint.
CAESAR II
Jump to new posts GRP line: sif in "pipe to pipe" by vermaccio @ 01/16/19 07:57 AM

i have a GRP system and a "pipe to pipe" branch (it was an unequal tee but now client changed in pipe to pipe). when it was an unequal tee, i set sif according to EN ISO 14692-3 (2002), par. D.2.3 Now in nomore an unequal tee. How can i calculate
CAESAR II
Jump to new posts Re: liberal stress in EN 13480 by vick @ 01/16/19 03:52 AM

Hi Richard, Thanks for your response. I had read the mentioned paragraphs Still I am confused whether paragraph 12.3.4 speaks about operating stress or liberal expansion stress for sigma4 stresses. Can you please through some light on this?
CAESAR II
Jump to new posts expansion joint weight by vermaccio @ 01/16/19 02:27 AM

when i create an expansion joint i set data in E_J windows (axial stiff, trans stiff, bending stiff, torsion stiff, effective id). 1) where do i add the EJ weight? 2) if i don't insert any weight, the EJ weight is calculated as the weight of a pipe
CAESAR II
Jump to new posts Mistake in max stress from expansion casses by Ahmed_Kamal @ 01/16/19 01:14 AM

Hello Richard, Dave , Our client ask us to add load cases to select max stress from expansion cases. However after I did that all stress in expansion cases are save except the load case which select the max stress. I understand that max stress load
CAESAR II
Jump to new posts Re: thrust load on Expansion joint by Michael_Fletcher @ 01/15/19 05:55 PM

Expansion joints are only capable of protecting you from movement in the plane parallel to their axis at the expense of causing this thrust force. In this configuration, they are only helping to protect against movement in the X and Z from being tra
CAESAR II
Jump to new posts thrust load on Expansion joint by amemar @ 01/15/19 01:21 PM

Dear All, I appreciate if anyone can suggest a solution to the attached issue. I gave all information in the attachment. Regards,
CAESAR II
Jump to new posts CAESAR Pet Tricks by Michael_Fletcher @ 01/15/19 09:32 AM

To be honest, I don't like the kind of windows dialogue box uses when creating a "new" CAESAR file. It's inconvenient to me as all our network servers are not conventionally named in easily memorable manners. In lieu of this, I create a new text fil
CAESAR II
Jump to new posts Re: Wind Loading by anubis512 @ 01/15/19 08:25 AM

At least the "g" factor has pretty simple equations to check; I've made a quick Excel sheet that matches Caesar's output to confirm. I think Caesar does a good job of being up front about what it does and how it does it. If you want to really peak b
CAESAR II
Jump to new posts Re: Wind Loading by mariog @ 01/15/19 07:09 AM

Your point is valid, no doubt for me. Caesar may be improved in presenting the details of calculation. For example, the "G" factor is still within "the black box", as I know- and this really makes hard any checking. Of course you are right about ASC
CAESAR II
Jump to new posts Re: Wind Loading by DBS1958 @ 01/15/19 05:01 AM

mariog, I do not need to study the ASCE Code. It would seem that the Code has some strange limitations which other Wind Codes do not. The possible limitations are probably due to the fact that the ASCE Code is basically for "Buildings" and we
CAESAR II
Jump to new posts Re: Wind Loading by DBS1958 @ 01/15/19 04:54 AM

Anubis, Strange you saying that Caesar is just a tool. You concur with the understanding of analysis software I have had for the last 45 years whilst working in engineering. I actually thought your statement enlightening.
Page 1 of 2 1 2 >
Who's Online
0 registered (), 41 Guests and 2 Spiders online.
Key: Admin, Global Mod, Mod
January
Su M Tu W Th F Sa
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31
Forum Stats
11597 Members
14 Forums
15697 Topics
70569 Posts

Max Online: 126 @ 05/09/18 04:29 PM