Pipeline Stress

[cadista]

Hey Everybody,

I am doing Stress Analysis for Buried PipeLine app 75km long, all of this in Caesar II. However I'm modeling a section, app 30km, because Caesar can´t import all 75km for this reason, i´m doing for sections. I'm doing two analysis , one of 30km and other of 35km
- How I can load some properties from de section of 30km to section of 35km?
- Which properties should I load?
For properties I mean I mean the forces, stresses, displacements, restraints, etc.
Regards, WCQ

[ani_dat]

When we model a buried pipeline section in CAESAR II, once we create the buried model, C2 removes all the definition such as bends, tees, restraints, etc and allocates some stiffness in different elements.
First of all, it is required to know whether your entire stretch of 75 km is underground or there are some portions which are aboveground. Considering your entire stretch as underground, as you are building up 2 separate models, please consider a virtual anchor at the junction point of both models, and find the resultant of forces and moments acting on that anchor from both sides of pipe i.e. from both models.
If you send me your email id, I can send you an example (of course of much shorter length, but with the philosophy explained).

[ani_dat]

When we model a buried pipeline section in CAESAR II, once we create the buried model, C2 removes all the definition such as bends, tees, restraints, etc and allocates some stiffness in different elements.
First of all, it is required to know whether your entire stretch of 75 km is underground or there are some portions which are aboveground. Considering your entire stretch as underground, as you are building up 2 separate models, please consider a virtual anchor at the junction point of both models, and find the resultant of forces and moments acting on that anchor from both sides of pipe i.e. from both models.
If you send me your email id, I can send you an example (of course of much shorter length, but with the philosophy explained).

[masoud123]

Long buried pipeline is fully restrained, so accordingly computer stress analysis is not required.
Simple formula for thermal stress analysis and anchor force calculation is suffice.