None that I know about

I grow a lot in the ground in zone 8. They survive just fine with only minimal winter protection, which means I cover them when its forecast for a hard freeze (anything under about 29 degrees).
I have Aechmeas, variegated Ananas (pineapples), Neoregelias, and Nidularias in the ground mainly and have grown them outdoors for, oh I guess about 6-7 years. They have formed large colonies.
The trick is to plant them in protected locations under a canopy overhang. That can be a tree, the eave of a house, or the protection of a hedge.
You can have a lot of beautiful bromeliads outdoors in zone 8. Don't let anyone tell you otherwise.
If you'd like to see photos of mine, I will post some.

I've many grower friends who have great success (some failures not withstanding) with bromeliads in Z-8A and B. As Bihai stated above, some have formed large colonies where the copious amounts of water stored in the leaves actually adds a humidity barrier to guard against freezing. The overhead canopy is an essential part too if you can arrange it. Trial and error is the basic formula. Thick-leaved species should be the easiest.

Bilbergia nutans will grow here. I've had some outdoors for fifteen years or so, and they do fine. Someone a street over from me has an outdoor brick planter full of Bilbergia probably nutans.