Hi, we have a complex model containing pipework and its corresponding structural supporting frames, and would like to apply a ground acceleration time history to the frame support points where they connect into the building structure. However, when selecting these in Time History Location, AutoPIPE (Version 12.05.00.16) provides the following error message stating the beam nodes are "Invalid Point(s)". Pipework points and supports can be selected in the THL dialogue box. Is there any way to apply a Time History to beam nodes (or any neat workarounds suggested)?
Kind regards,
Tim
Greetings,
Are you trying to do a Time history ground motion where the same THP is applied to all the supports connected to ground. Then you only need to perform the following:
1. Define the THP (Time History Profile)
2. On the Time history Dynamic Dialog created a new Load case, check the box for Ground motion and press the Define button to select the profiles (ex. Test) for the given direction (ex. X-dir) to be applied.
3. Run Analyze all.
4. Review results.
5. Done.
However if trying to model a MSRS as a time history where one can define a particular spectrum for a specific set of supports attached to Pipes. Then create a THL (Time history location) file by using the dialog feature or manually as indicated in AutoPIPE help.
There does seem to be an issue with adding a beam node point supported by anchor in the THL dialog (see image above and below). I have asked the development team to investigate the issue (713085). I will post more information on this thread after the development team's review and response.
Regards, Mike Dattilio Design Analysis Engineering Group Senior Analyst Bentley Systems Inc=============================================================================
Hi Mike,
Thanks for the response, and for flagging the issue with including beam nodes in the THL dialogue. Please do let us know any advice from the development team. To clarify, we cannot select beam nodes at all, irrespective of whether an anchor is applied at the node or not.
One workaround we're thinking of testing is to generate a new dummy pipework segment, and connecting this new pipe point to the beam end node of interest with an Anchor / Rigid Link (see following image). Then the new pipe point may be able to be selected in the THL. We'll report any progress in this thread, and would be grateful to hear your thoughts of this.