Collapse of the Tacoma Narrows Bridge on the 7th November, 1940
ฝัง
- เผยแพร่เมื่อ 8 มี.ค. 2013
- The video shows the collapse of the Tacoma Narrows Bridge due to excessive resonant vibrations. A gentle wind cause the Tacoma Narrows Bridge to resonate to destruction.
- วิทยาศาสตร์และเทคโนโลยี
RIP Tubby :(
RIP Tubby.
"Tubby" the dog fell into fame when Galloping Gertie collapsed on November 7, 1940. As the only victim of that great disaster, Tubby has earned a special place in the hearts of many. His death symbolizes the drama of that terrible day. All that is known about the unfortunate pooch is here. These few facts are a small but meaningful way to honor his unique place in history.
Even with the "normal" oscillations I wouldn't drive on that!
Mesmo com as oscilações "normais" Eu não iria conduzir sobre isso!
WSU Press; Hobbs, Steve; "Catastrophe to Triumph: Bridges of the Tacoma Narrows" p86. 2006
Indication that a slipping cable band on the North main cable caused the center span to oscillate sideways resulting in span failure.
Many thanks for your contribution hwyfan.
We are studying waves and our professor showed us this
The fatal torsion that wrecked the bridge on November 7, 1940 after one of two mid span braces placed between the cable and the girder as a temporary securing measure slipped. They were intended only to be temporary braces until permanent brackets could be fashioned. They were placed there at the suggestion of engineer David Steinman, who used them on his Thousand Islands span in 1938 when it started exhibiting wind torsion.
hwyfan - That’s very interesting. If there were modifications that introduced an asymmetry due to a stay slipping or breaking, it is an obvious suspect for initiating the twisting mode. I haven’t read about it anywhere else, though.
According to this article, Steinman offered his services but the offer was turned down:
www.inventionandtech.com/content/bridge-didn’t-collapse-1
If you listen closely, you can hear the suspension cables making whipping noises in rapid succession.
hwyfan 2 anos atrás
A torção fatal que destruiu a ponte em 7 de novembro de 1940 após uma das duas chaves de span meados colocados entre o cabo e a viga como medida de fixação temporária escorregou. Eles eram destinados apenas para ser chaves temporárias até suportes permanentes pode ser elaborada. Eles foram colocados lá por sugestão do engenheiro David Steinman, que os usavam em sua extensão de mil ilhas em 1938, quando ele começou a expor torção vento.
Mario Salvadori has written a couple of books on structures for the lay reader which should be in the library of anyone interested in structures.
Imagine being the person to get *THAT* call
Yes; poor old Tubby; the only fatality cause by the demise of the Tacoma Narrows' Bridge.
Interesting!
That is crazy!!
AMU student here - 24JUN20
how come the bridge is swaying... is it that weak (before the collapse)
+Roger That Its Engineering Its called Flutter.
Roger Huang - It is relatively lightweight and designed to be flexible. A little bit of side-to-side sway is a minor problem. The undulating and twisting modes were not anticipated.
Ah, the demise of "Galloping Gertie".
That poor Dog
Poor lil doggie. 😢💔
Is it due to Resonance?
Yes. Feed energy at the natural frequency of oscillation and the amplitude of the response starts growing
Leon Moisseff was not the leading suspension bridge designer of the era. The Tacoma Narrows was in fact the first span on which he was chief engineer and designer. Othmar Ammann was the greatest designer of the era. Moisseff died in 1943, three years after the Tacoma collapse.
hwyfan - It’s odd that Salvadori would get the year of his death wrong, because he was a recognized expert in structures.
Tubby:C
I am glad that you found it interesting
Such UGent, much movie
Thomas vindt de brug leuk
Thomas pensa que a diversão ponte
Did the dog die because last one the dog suvired
Crystal Hawes volgs - The dog died.
poor gurdy lol
N
Sorry about the guy in the car..
I disagree strongly with the idea that it took 52 years to find the cause of the disaster. The concept of alternate vortex shedding was very well known long before 1992. Indeed, it was taught during my time studying Civil Engineering at a UK university in the 1970s. One of several exemplars used in this teaching was the Tacoma Narrows bridge.
he ment it took 52 years for uneducted americans, who propably dont firmly know where to find your UK on a map.
foto2021 - Was there a model that proved it, or was it just assumed? That could be the difference.
Yes, I agree with you.
Resonance of structures can cause the failure of many different structures, from wine glasses to tall buildings, and from aircraft to submarines, and very many more structures. To see other structures resonating on my youtube site, Google "carltfross youtube" to access my youtube site.
Ressonância de estruturas pode causar o fracasso de muitas estruturas diferentes, desde copos de vinho a edifícios altos, e dos aviões a submarinos, e muito muito mais estruturas. Para ver outras estruturas ressoando no meu site youtube, Google "carltfross youtube" para acessar o meu site youtube.