Had this happen a few years ago to a flybe 146 (although possibly not as bad as this one). We ended up ferrying it out to Exeter unpressurised. It's a pretty tough structure, having said that you have to be careful when the ribs and stringers are damaged near the tail.
Probably not a good idea to scrap it, RJs are currently in quite high demand (although 146s are on the way out now, it seems).