Houdini destruction import issue

Hello everyone,

I made a building destruction in houdini and try to export it to UE4 but face-off some problems to do it. First I exported it in a alembic file which works fine in maya and cinema4d but make UE4 crashes in skeletal mesh and in geometry cash too. I converted this alembic to an fbx and the big pieces works well in UE4 but many of the smaller pieces goes crazy and fly everywhere. I tried older fbx and some fbx export from others software like cinema4d and maya but the same issue appears everytime. Is there a sort of limitation for that kind of effect in UE4 ? Thank you for your answer.