I have to ask - if you're behind a pedestrian (on a pavement, shared route, whatever) and ring your bell, do you expect them to move? Surely the onus would be on you to move around them?
If I'm on a shared path, people should generally be sticking to the left side (you can spot good/seasoned cyclists if they're following that rule on my shop commute). I do. I always ring my bell (softly, just once) so they know I'm there behind them, and about to overtake (on the right, like you would in a car).
So my bell is used as a "please be aware, I'm behind you", only in very few cases does it mean "please move". It only really means that when people are blocking my path and there's no way through.
This is what I meant earlier when i asked people to check the pavements they were referring to - national cycle routes DO get routed onto shared use pavements, and the signs/awareness of it aren't great in many cases. look for the tiny blue signs (the ones with bikes and arrows, plus some circular signs showing a person walking and a bike next to them).
I would normally move around a person, and not expect them to move.
Unless they are blocking the shared use path, in which case, i'd expect them to move yes - it's a shared use path, and we can both use it together 
This general rule seems to be "the" way that thigns/people work on the shared use roads/pavements i use, so hope that clarifies re: the bell use.
Unfortunately, the cycling route which are segregated/dedicated lanes are pretty rubbish around here, almost non-existant or have so many repairs that they're a death-trap waiting to throw you off your bike, so i tend to use the shared pathways most if i have any choice about alternative routes.
i find that cycling infrastructure locally isn't terribly well considered during road closures etc either - it's almost like they forget cyclists exist! There's one bit near me locally where pedestrians have a barricaded bit to walk around a set of traffic works, cars do too.. and then what they've done for cyclists is force us into a bit of the pedestrian bit with signs telling us to use it.. like it was an afterthought.
So we're not supposed to use the bit where cars go on the road, but we're meant to just mesh with pedestrians, and bump up kerbs several times in order to get where we're going... 
It's a mess.