Seismic assessment - pipework
Seismic assessment - pipework
(OP)
I am not sure if this is the right forum - so my apologies if it is not.
I might get involved in assesseing an existing pipework in a power stations for seismic loads. The pipework is made of plastic. I would like to get some ipnut in what aspects do you think are the mosst important / vulnerable. My initial gut feeling is that ductility / flexibility might be an issue for differential support motions and that glued connections might also be susceptible. I am not sure what type of joints do they have. In case we go ahead with that we will get site visit done - any ideas on what to pay special attention to (in addition to usual surveys).
Thanks
I might get involved in assesseing an existing pipework in a power stations for seismic loads. The pipework is made of plastic. I would like to get some ipnut in what aspects do you think are the mosst important / vulnerable. My initial gut feeling is that ductility / flexibility might be an issue for differential support motions and that glued connections might also be susceptible. I am not sure what type of joints do they have. In case we go ahead with that we will get site visit done - any ideas on what to pay special attention to (in addition to usual surveys).
Thanks






RE: Seismic assessment - pipework
RE: Seismic assessment - pipework
RE: Seismic assessment - pipework
You can add seismic accelerations to the operating loads in Caesar II/ Caepipe, etc. You ought to make sure the correct properties for the pipe are used in the stress analysis. This might be a moving target because properties are sometimes hard to get. Glued joints, if done properly, probably aren't any worse than other areas, except when the pipe wall is shaved down to fit into the socket.
Also remember if this is filament wound fiberglass plastic pipe, the axial strength is not the same as the hoop strength (far lower).
Best of luck with the evaluation.
RE: Seismic assessment - pipework