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The first hypothesis of the failure of the Tacoma Narrows Bridge was resonance (due to the Kármán vortex street). [29] This is because it was thought that the Kármán vortex street frequency (the so-called Strouhal frequency ) was the same as the torsional natural vibration frequency .
The first Tacoma Narrows Bridge was a suspension bridge in Washington that spanned the Tacoma Narrows strait of Puget Sound. It dramatically collapsed on November 7, 1940. The proximate cause was moderate winds which produced aeroelastic flutter that was self-exciting and unbounded, opposite to damping.
Ibrahim and Yang Lu, an associate professor of civil engineering at Boise State and an expert in forensic analysis of failed structures, both referenced the 1940 collapse of the Tacoma Narrows ...
Vortex shedding was one of the causes proposed for the failure of the original Tacoma Narrows Bridge (Galloping Gertie) in 1940, but was rejected because the frequency of the vortex shedding did not match that of the bridge. The bridge actually failed by aeroelastic flutter. [2]
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Ammann wrote two reports about bridge collapses, the collapse of the Quebec Bridge and the collapse of the original Tacoma Narrows Bridge (Galloping Gertie). It was the report that he wrote about the failure of the Quebec Bridge in 1907 that first earned him recognition in the field of bridge design engineering.
The Tacoma Narrows Bridge is a pair of twin suspension bridges that span the Tacoma Narrows strait of Puget Sound in Pierce County, Washington. The bridges connect the city of Tacoma with the Kitsap Peninsula and carry State Route 16 (known as Primary State Highway 14 until 1964) over the strait.
A multiple vehicle crash on the Tacoma Narrows Bridge has caused state Route 16 westbound traffic to slow significantly. The wreck occurred just before 4 p.m. Monday, according to Tacoma Fire ...