What could be the reason/s why the gravity load is acting on positive/up direction?
Greetings,
There could be any number of reasons. Suggest that you animate the various load cases to see how the model is behaving.
Remember, do not be concerned with the individual load case, be concerned with the operating combinations.
If there are any questions about the operating conditions, then look at the individual combinations to understand how the operating conditions are calculated.
Regards, Mike Dattilio Design Analysis Engineering Group Senior Analyst Bentley Systems Inc=============================================================================
Answer Verified By: Mike Dattilio
Hi Mike,
Thank you for your reply. After reading through some old queries in the forum, I stumbled upon a post on how AutoPIPE reports forces & moments depending on the segment direction. After reversing the segment directions, gravity forces & related load combinations are now acting downwards as expected. However, when I checked the support forces, the load combinations with GR have a +ve direction. The supports are vertical and have a 0.8 coefficient of friction. The +ve force acting on the support would actually make sense if it is reporting the frictional force since it is the opposite of the normal force. Is my interpretation of the support forces correct?
I am unable to comment until reviewing the model.
Regardless, suggest to review AutoPIPE help (search for) "Friction coefficient" page and under See Also, on this page, "Support Friction Properties". This should address any questions you have about friction load on supports.
Mike,
How can I send the model so you can have a look?
Please see here.
Be sure to attach an AutoPIPE APC file.