It's possible they mean the same thing, but it's also possible they don't.
1. By the time we got here, the place was barricaded.
This means that when we got there, there were barricades in place.
2. By the time we got here, the place had been barricaded.
All this means is that when we got there, the place had been barricaded at some point before. It may or may not still have been barricaded when we arrived.
For instance, both of the following could be added:
2. a) By the time we got there, the place had been barricaded [three times already, but each time the obstacles had been removed. It's current state was free of barricades].
2. b) By the time we got there, the place had been barricaded [three times already, but the first two times, the obstacles had been removed. However, after the third time, they were still in place].
Without additional context or clarification, had been doesn't give a definite statement about the current situation (with respect to the time period being described).
So, the two sentence might mean the same thing—or they might not.
The same analysis applies to the second set of sentences. Will have been closed doesn't necessarily mean that it will still be closed when we get there. Only that it will have been closed at least once at some point.