Isabelle, have been searching for info on Oriana, & QE2 regarding expansion joints, not been lucky as yet, came across a video & posted it regarding the improved version on Brittanic, after Titanics sinking.
Now here's an interesting report on Rotterdam suffering fatigue damage to her expansion joint, 1 of 4 according to the intro.
It makes heavy reading to be honest, but non the less I didn't realise so much work went into these things, (maybe that's why they didn't put any on QE2?). Figs 2 & 3 show the detail.
http://www.shipmotions.nl/DUT/PapersReports/1166-PRADS-98.pdf