lateral analysis of irregular shaped building

I was recently asked to analyze an irregular shaped building. Each of the wings in the building resemble hockey sticks that are joined with a straight section. The LLRS consists of moment frames in both directions. In addition, there are expansion joints at the locations where the hockey sticks join the straight section. Therefore I would assume we have three buidings. Also there is no symmetry in the structure. It is very straight forward to analyze the straight section but how do analyze the hockey stick shaped section? Any input or references would be appreciated.I have checked the UBC and there is nothing that applies to this situation.


Thanks in advance