One tiny design flaw in the bridge caused it to collapse, and that collapse is still taught in engineering, architecture, and physics classes today. 🧐 engineering
As soon as construction workers completed the deck, they noticed that during windy conditions, it would move vertically, and they nicknamed the bridge"Galloping Gertie".
The Tacoma Narrows Bridge was opened to traffic on July 1, 1940, and drivers quickly noticed that the bridge would oscillate vertically up to several feet. Authorities moved to reduce the vertical oscillations by adding tie-down cables anchored toAdvertisement Next, engineers tried adding cable stays connecting the main cables to the bridge deck at mid-span, but that also didn't work. Finally, engineers added hydraulic buffers between the towers and the deck that were designed to damp the longitudinal motion of the bridge. These failed when the hydraulic seals were breached when the bridge was sandblasted prior to being painted.
Authorities next hired an engineering professor at the University of Washington to analyze the problem. He and his students built aof the bridge on which they conducted wind-tunnel tests. They submitted their conclusions on, and they suggested drilling holes in the lateral girders along the deck to allow the wind to flow through, and the addition of fairings or deflector vanes along the deck to aid its aerodynamic shape.November 7, 1940As luck would have it, at 11:00 a.m.
A subsequent inquiry into the collapse determined that what brought the bridge down was a twisting motion that occurred when winds reached
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