Negatory.......most bridge joints are not joined together anyway. They either have an expansion joint or a construction joint above nearly every column so they can move and flex a little with the weight of hundreds of cars and trucked crossing them.
When concrete is subjected to a roaring blaze like this the air in the concrete expands and explodes ,exposing the steel and pre stressed cables in these precast beams.
If you saw it on tv,there was concrete rubble on the Buford connector where the firefighters were BEFORE the bridge collapsed ,that was from the concrete being heated and popping
You just said exactly what I said in a more scientific way lol. Nothing melted.