Hello,
Well, Do you really want to analyze an elastomeric expansion joint or do you want to analyze a piping system that includes an elastomeric expansion joint (EEJ)?
Assuming the latter, I don't see much difference in the analysis techniques required for systems including various expansion joints be they metallic or elastomeric. There is a wealth of information available in the Caesar II (CAESAR II)manuals which addresses this topic.
Of course the first thing you will want to do is check with the manufacturer of the EEJ to make sure it is appropriate for the temperature and pressure of the piping system in which it is intended to be used. Since the system is FRP, it is likely that the EEJ will be OK (assuming the FRP is appropriate). Then all the warnings provided in previous threads regarding expansion joints apply. Remember an EJ is one third of a system (anchors and guides are also needed). Remember that an expansion joint is a (beam)discontinuity in the pipe it is installed in (in many regards, the EJ "disconnects" the two ends of the pipe that are connected to it)and hangers will be needed on both sides of the EJ. Your system will have equal and opposite "bore thrust" forces applied (away from the EJ) since the EJ is a discontinuity in the pipe wall (see Dave Diehl's comments in earlier threads - Rich, can you supply a path?). Finally, be aware of the EEJ's limitations regarding total travel.
Regards, John.
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John Breen