cu
No - not practised in sim sessions. The reason for this is that it is not a situation deemed possible to happen. We do on occasion paly around with degraded control authority which on the A320 might be mechanical backup (pitch trim, rudder and engines only) but that is only seen as a temporary state of affairs until more functionality is regained. On the 737 we used to practise loss of Sys A and B hydraulics which left you with cables to the ailerons and elevators and hydraulic rudder - extremely heavy to handle (actually did it for real on a test flight over Boscombe Down - just like the sim).
The fact that the Sioux City guys found the airfield, let alone the runway and people survived speaks volumes for their abilities and airmanship - real heroes imho.