×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

STAAD and AutoPipe - Simplified Integration (wrong results)

STAAD and AutoPipe - Simplified Integration (wrong results)

STAAD and AutoPipe - Simplified Integration (wrong results)

(OP)
Dear Forum Users,
I'm calculating pipe and pipe supports stresses due to thermal expansion of pipes. I'm following this Bentley video: PipeLink - Simplified Integration https://www.youtube.com/watch?v=ej6fFXog9MU)/watch... .

According to the video I have to (in AutoPipe) calculate forces in supports, which are treated as rigid (Ground connection) and export them to STAAD. But these forces are pipes "internal thermal forces" not the forces, which I can apply to beam supports in STAAD. Because condition which cause to generate stress in beam is a pipe thermal displacement, not the "thermal force". So procedure from the movie leads to wrong results. Pipe displacements should be exported, not it's internal force. For example: exported "thermal" force which bends beam displaces it's free end by 30mm, pipe displacement in this situation equals to only 0.2mm.

Am i right in my considerations? Sorry for my english, but please watch the video and think about it.

I'll be grateful for your response.
Robert

RE: STAAD and AutoPipe - Simplified Integration (wrong results)

The supports in AutoPIPE can be assumed rigid or flexible while still maintaining a link to STAAD.pro via Pipelink.
The reactions to the supports are transferred to the superstructure in STAAD.pro as external loads. In the case of the AutoPIPE thermal effects, these are imported to STAAD.pro as a reference load case with the Title "Pipe Thermal", but the forces in that loading are just static forces taken from the AutoPIPE analysis support reactions.
Getting the displacements of the supporting beam in STAAD.pro to match the support deformation in AutoPIPE is achieved by running through the process a couple of times, though one or two trips is usually sufficient for the work I see.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources