Thank you for all your excellant answers to my previous questions. I've got another slightly tricky one for you.
How should a Stauff Clamp be modelled? These pipe clamps have a plastic liner and restrain lateral and up/down movement, but also axial movement (e.g. act like a line-stop) as the pipe is clamped. At a certain value of axial force the pipe will move through the pipe clamp, as static friction has been overcome. These maximum loads in the pipe (axial) direction are given in Stauff literature. For a DN100 heavy duty clamp this value is 14 kN.
Is there any way to model this phenomenon in Autopipe? e.g. a linestop or stiff axial spring, which will resist axial movement untill 14kN,, and then allow the pipe to move. This type of functionality is present with soil, e.g. resist to a certain force then allow movement - but is there a way to apply something similar with a pipe support?
Thanks for your help.
FR
We do not have a bilinear supports other than soil at this time.
One possible solution is to check the vertical reaction at the support and see if that varies between GR and GR+T1. If the variation is small, I would set the friction factor = 14KN divided by Vertical reaction.
Otherwise you can insert soil around the support and set the friction accordingly.
Regards,
Karim
Hi there - just wondering if there's been any progress or further development on AutoPIPE that provides a better solution for this problem?
Jay,
We do have the following enhancement in our system for implementing this support type in AutoPIPE:
Enhancement: Add damping clamp type support in AutoPIPE with bi-linear support stiffness
This enhancement should cover the friction-slip type clamps when implemented.
Bilal Shah
Hi Bilal,
Thank you so much for this update.
Could you please provide me with a sample model - or explanation on how to use this new damping clamp type support? So for example, if I have a u-bolt clamped onto a pipe with 45kN pre-tension applied - then how would this be specified in AutoPIPE?
Cheers,
-Jay
This enhancement is not yet implemented in AutoPIPE and will be implemented in a future version of AutoPIPE.