Big RC is a great example. The guy is still a beast after those surgeries.
I think pain tolerance and the mind are very big factors in this. Those things are partly what allowed him to do the things he did and now allow him to go far past what most would even dream not long after surgery.

I broke my neck, cracked c5 & c6. Surgery and back in the gym the on the 7th day out. I trained still with the cracked discs so refused to take more down time. Six weeksno overhead lifts, no benching, not supposed to put the bar on my back and do squats....but did everything else normal, did inverted icarian front squats with all it would hold for reps ass to to the grass and deck squat, hack squats. Full back workouts. After the six weeks straight back to normal, heavy heavy everything. Back playing with mma as well after 6 weeks.

I am one of the few I know with major neck/spine or back surgery that have zero issues,
I attribute that to many years of training and the immediate training after surgery. My theory is it keeps the scar tissue broken up and keeps you mobile.

I also rehabbed a good amount of people with back surgeries, full hips and knees as well. If willing to push yourself you can get back to your normal . Obviously progress weekly and push yourself and it will keep improving. If your mind is determined to do it, the body can usually take much more and achieve much more than most ever think. The body is an amazing machine built to adapt and survive.

Get into rehab the first minute you can and work it brother. The biggest thing is not letting scar tissue build and keeping flexible. It seemed always that the weights actually help push for flexion and help improve much quicker. I had several guys training 3 days a week with me and rehab 3 days a week and the rehab guys would be asking them what the hell I was doing because they were improving so fast, 120 degrees flexion on a knee for example. Simple leg press , good stretch at the bottom controlled 15-20 reps, stiff leg deads controlled 95-135lbs+ depending on the guys level of weigh training before surgery., 5 sets each to start...by 8 weeks or so would be at a decent full leg workout.

(if you can I would be doing some HGH and Var, winny wont hurt either, all will accelerate healing )

Good luck in your recovery

You just have to use logic, not emotion. After two back surgeries, I cant do squats or deads. I just do other lifts instead. Good luck.

I cant speak to hip replacement but I had both knees done 4 years ago. I was to the point that I couldnt really do a leg workout due to pain, i put my replacements off until it impacted my every day life. Go ahead to 2 years after my knee replacements and I squated 405. I know it is probably not the smartest thing to do but I did it for me. I have since backed off on the weight and am usually 315 to 365 for stricter deeper reps. I know my replacements are supposed to be good for 20 plus years and I will certainly get less due to lifting but for me I need to balance my happiness with everything else. If I have to get them done again when I am in my sixties so be it.

Maybe this will inspire you. I hope so.

http://generationiron.com/ronnie-coleman-back-gym-hip-surgery/

Ed Coan had one and is still lifting heavy ass weights. Not what he used too but he the age plays a roll as well and still he lifts more than most people ever will. Just saying that when the "greatest powerlifter" of all time still lifts after a hip replacement you probably can too. He's a good example of what the replacements are able to bear and what stress they're able to stand against. I guess you're no where near the weights he moves, so my suggestion would be, work your way into it, don't rush things.

Further I just want to add a small thing. Most docs will never have professional powerlifters, strongman, weightlifters or bodybuilders as patients. Usually this is why they won't or can't give you a direct answer on what you'll be able to do in future. Mostly they go the conservative route and recommend of stop what you're doing. People will otherwise go and continue the way they did and if hell breaks lose, come back to the doc and say "but you said it's ok..." or even worse, sue them.
This is why you rarely will hear a doc say "you're into weightlifting and need a hip replacement...of course you can still lift the way you did!".
I was searching a long time for a doc specialized in that field with a lot of actual exp. on high level athletes. I'm now going to the doc who's dealing with the national weightlifting athletes and I'm quite sure he has seen lots of lifting related injuries and he's able to give me a proper recovery routine.

There's always a way to continue to train. You see it all the time. Brandon lilly had a major accident 2 years ago and doctors said that he can be greatful if he's ever going to walk normal again. Just a week ago he hit an alltime deadlift PR of over 800lbs. Same goes for veterans who lost a part of their body and I guess, everyone would claim that you won't be able to do any real activity anymore. What I'm trying to say is, if it's really important to you, there's always a way. Perhaps you won't be able to train the way you used to, perhaps you can. But there are no real limits and you can still achieve a lot.

Did Bo Jackson still lift after hip replacement surgery? He looks pretty decent for a man his age. You should see if you can dig up some info about it.