How to connect wood diaphragm to concrete slab

[EBF]

I am working on a multi story residential building in California, Seimic Zone 4, 2001 CBC. The first level is a 2 way concrete slab supported on concrete columns and CMU walls. At the second level, half the area is wood framing while the other half is concrete slab. The upper 3 levels are wood framing. My question is regarding the second level joint. Is it acceptable to connect the wood framing to the concrete part, or is a seismic joint required? If I connect it, what forces do I design the connection for? Where can I find more information on this subject? Thanks,

 

[AlohaBob]

You can isolate the two or tie then together.

If you tie them, it's likely the concrete will see the wood framing as a mass load just along for the ride rather than of helpfulness in resolving vertical or lateral loads.