Warehouse are meant as such -- places where artifacts are, first and foremost, contained. Having said that, I wonder why there is no research into possible combinations of artifacts and their inner workings in general. In the series we see Claudia tinker with (and sometimes improve on) some single artifacts, but I'd call that sporadic.
Also, in seasons
4 & 5 Paracelsus, after being de-bronzed, proceeds to create and alternate timeline wherein he turns the Warehouse into a research facility, and he did study artifacts and their interaction. Granted, the whole setup was quite totalitarian and the guy was arguably a sociopath, yet
the whole topic of research is never, as far as I can recall, visited again.
Is there an in-universe explanation for that?
To forestall a point in possible answers: I realise that the more powerful artifacts tend to have (sometimes quite significant) downsides. What I meant by research included figuring out ways to neutralise and counteract those (possibly with other artifacts, which we see the characters do several times throughout the series).