Also, just a headsup for everyone, many of our specimens failed at compression side of the joint. Fatigue failure due to pure loading in compression is very much possible and even can be very similar to pure tension! This is something that many engineers seem to wipe of the table instantly, for example by only calculating with maximum principle stresses in the FE model, so watch out.
From our own tests it is has become even more clear that fatigue calculations are not straight forward. General thoughts do not always match results from practice. And also widely accepted and used standards and fatigue calculation software can easily miss an accurate fatigue life estimation of a construction.