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I have a high school understanding of bridge mechanics but how did a hit on one side make the whole thing fall? Can bridges be given supports to be secure if one section is damaged ?
By high school understanding, we had to build bridges out of sugar cubes or popsicle sticks that could support a heavy load.
whole bridge didn't fall. It hit a central support column that holds up both sides & a good chunk of it collapsed. The bridge is over a mile long so the videos make it seem like the entire bridge fell but that is only a section of it.
The bridge requires an even amount of weight to be on each pylon. If one pylon goes down all the weight shifts to the other and the whole thing goes down.
https://en.wikipedia.org/wiki/Continuous_truss_bridge
Thanks! I was trying to understand how the untappee pylon still caused collapse.