Vectorworks can assume object identity when importing Sketchup

I haven’t really played with this, but theoretically you could:

1. Import a Sketchup file into Vectorworks
2. Vectorworks will attempt to create floors, roofs and walls
3. Export to IFC
4. Import into your BIM program of choice…

When importing a sketchup document, by default it will attempt to import the file as if it were an architectural design document, it will try to determine which objects are floors, roofs and walls.
via
Vectorworks KnowledgeBase :: 3rd Party File Formats – Google SketchUp