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Don't think we have this troped. Probably not enough structural engineers amongst us. Anyway, such a scene lends itself to Help, I'm Stuck!.
Possibly Special Effect Failure. It already covers "That's supposed to be rubble from a collapsed building, but it's clearly just styrofoam!" So "Why do broken parts of a spacecraft look more like rubble from a collapsed building?" doesn't seem like too much of a stretch for that.
I didn't write any of that.
@Meta Four - Possibly, though in the case of The Orville, it's actually a plot point that what falls from the ceiling is massive enough to kill a character (sparking the episode's plotline). But for something that big to fall from the ceiling in a spaceship, that spaceship should be falling apart. Special Effects Failure feels more like "They wanted to show this in a story, but this is the best we could come up with."
You could always fall back on Artistic License – Physics.
In a recent episode of The Orville - but I have seen this in other shows such as Star Trek - during a scene where the ship is taking heaving damage, a crewmember is trapped when a big piece of Engineering's ceiling, which resembles a mixture of beams or rubble, falls on him. This has never made sense to me because a) if a beam falls from the ceiling that means the ceiling is falling in which is not a good thing when it's actually the outside hull of a spaceship or the deck above. Something falling down to that degree should compromise the integrity of the ship itself. And most ships aren't constructed of concrete. Is there a trope for this sort of thing? the climax of Wrath of Khan is another example of this.