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Galloping Gertie - Aeroelastic Flutter and the Tacoma Bridge Disaster

 
 
Reply Sat 20 Sep, 2008 03:10 am


Wikipedia wrote:
Galloping Gertie is the nickname given to the original Tacoma Narrows Bridge, which opened on July 1, 1940 and dramatically collapsed into Puget Sound on November 7 of the same year. The suspension bridge spanned the Tacoma Narrows strait between Tacoma and the Kitsap Peninsula in the same location as the current bridges. The bridge's collapse had a lasting effect on science and engineering. In many physics textbooks the event is presented as an example of elementary forced resonance with the wind providing an external periodic frequency that matched the natural structural frequency (even though its real cause of failure was aeroelastic flutter). Its failure also boosted research in the field of bridge aerodynamics/aeroelastics which have themselves influenced the designs of all the world's great long-span bridges built since 1940.

http://en.wikipedia.org/wiki/Galloping_Gertie
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TTH
 
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Reply Sat 20 Sep, 2008 04:16 am
This is what it looks like now. I haven't driven the new bridge yet (the concrete looking one)
http://www.transportation1.org/tif1report/images/TacomaNB1-07.jpg
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TTH
 
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Reply Sat 27 Sep, 2008 09:56 pm
http://www.transportation1.org/tif1report/images/TacomaNB1-07.jpg

I wanted to post the url for the picture since companies are suing people now, at least in WA State, for posting their pictures without permission.
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