Possibly only two!

• Journal of Digital Humanities http://journalofdigitalhumanities.org/ can’t find SJR though so it must be too new to include
• LLC: The Journal of Digital Scholarship in the Humanities http://eadh.org/publications/llc-journal-digital-scholarship-humanities was Literary and Linguistic Computing and SJR 0.37 http://www.scimagojr.com/journalsearch.php?q=145586&tip=sid

Although I am on the board of Journal of Interactive Humanities (ISSN: 2165-7564) there is no SJR as of yet.
http://scholarworks.rit.edu/jih/

For future reference: a Berkeley list of DH journals is here (I was briefly on the board of JITP but I don’t all the listed journals that well)
http://digitalhumanities.berkeley.edu/resources/digital-humanities-journals
Only Digital Humanities Quarterly would I argue for from that list but SJR of DHQ not listed at http://www.scimagojr.com/
Although it sems to have an SJR rank at http://www.coolcite.com/journal/20117 but I cannot vouch for this quality pro or con of this website!
So a note to DH journal editors, please try to reach a reasonable SJR ranking as I think this metric will become more and more popular with research organisations!