| Applies To | |
| Product(s): | AutoPIPE |
| Version(s): | ALL; |
| Area: | |
| Date Logged & Current Version | Sept 2022 12.08.01.010 |
Problem:
How to model piping supported by overhead steel embedded in concrete using AutoPIPE?
Solution:
With any modeling one should take some time to evaluate the criteria required and write down any assumptions.
Example,
Which directions are restrained? - Answer: pipe for all intents is rigidly supported from displacement in all directions.
What stiffness are going to be applied in all directions? - Answer: assume rigid (see Edit model options dialog for rigid pipe / support stiffness settings)
Should a simplified approach or detailed approach be used? - Answer: user must decide if a simplified approach is suitable or if a more detailed approach is needed.
Another words, should the most detailed modeling approached be used or just use a simplified support that good enough.
Approach #1: Simplified Rigid support
At a give node location insert an Anchor.
Modeling as an anchor is quick and easy. The user can assume that the support is rigid in all directions or decide to enter in flexible stiffness values as needed.
Approach #2: Simplified Supports
Insert one or more supports as needed to meet the requirements establish earlier. Insert a Guide, a Line Stop, Rotational, etc..
For each support adjust the settings as needed to the meet the expectations mentioned earlier.
Approach #3: Detailed support
The requirements for this approach are a lot more involved. However should provide the most realistic results of the 3 approaches
First insert a Beam Section Property with that of the vertical steel imaged above. Then insert a steel beam from the assumed ceiling anchor attachment point to the surface of the pipe (example node = Sur).
Next select the pipe node point and insert supports as needed to meet the requirements of the support: Line Stop, Guide, Rotational, etc...
The concept here is that the supports are rigidly connected to the surface of the pipe, and that the Beam properties will resist movements in all directions. Again, the pipe must be restrained in the various directions and rigidly connected to the surface of the carrier pipe. Yes the user must enter values for support Friction factor, Gaps, Rotational Stiffness, etc... as needed.