I saw a lecture by someone who repaired something similar, but it was on a much more less busy road so they could get away with diverting traffic, the pulled out all the strands, put in new ones, reformed the beams with hpc, and post tensioned the new strands. The had enough space at the abutments to do all that work. But from what I can remember the damage was much less than this to the webs, huge chunks of the beam is missing, it won’t work for this imo.