Readers ask: Why Did The Tacoma Narrows Bridge Collapse Physics?

The Tacoma Narrows Bridge collapsed primarily due to the aeroelastic flutter. In ordinary bridge design, the wind is allowed to pass through the structure by incorporating trusses. In contrast, in the case of the Tacoma Narrows Bridge, it was forced to move above and below the structure, leading to flow separation.

What caused the Tacoma Narrows Bridge to collapse?

The collapse of the Tacoma Narrows Bridge was driven by wind-generated vortices that reinforced the twisting motion of the bridge deck until it failed.

Did resonance cause the Tacoma Narrows Bridge collapse?

[+] The collapse of the Tacoma Narrows Bridge on the morning of November 7, 1940, is the most iconic example of a spectacular bridge failure in modern times. Just four months later, under the right wind conditions, the bridge was driven at its resonant frequency, causing it to oscillate and twist uncontrollably.

What was the main problem with the Tacoma Narrows Bridge?

The Tacoma Narrows Bridge collapsed primarily due to the aeroelastic flutter. In ordinary bridge design, the wind is allowed to pass through the structure by incorporating trusses. In contrast, in the case of the Tacoma Narrows Bridge, it was forced to move above and below the structure, leading to flow separation.

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What was the fundamental weakness of the Tacoma Narrows Bridge?

“The fundamental weakness” of the Tacoma Narrows Bridge, said a summary article published in Engineering News Record, was its ” great flexibility, vertically and in torsion.” Several factors contributed to the excessive flexibility: The deck was too light.

How deep is the water under the Tacoma Narrows Bridge?

The Tacoma Narrows is a difficult place to build a bridge. The water is over 200 feet deep. Swift, treacherous tides moving at over 8.5 miles per hour (12.5 feet per second) sweep through the channel four times a day.

Why matching is not allowed on bridge?

If their frequency is closely matched to the bridge’s frequency, the soldiers ‘ rhythmic marching will amplify the vibrational frequency of the bridge. “Many pedestrians fell spontaneously into step with the bridge’s vibrations, inadvertently amplifying them,” according to a 2005 report in Nature.

Can resonance be used to destroy anything?

Can resonance be used to destroy anything? Physicist: Nope! “Resonance” is a “driven harmonic oscillation“, where the driving force pushes and pulls at, or near, the “resonant frequency” of whatever it is that doing the resonating.

What caused the Tacoma Narrows Bridge to collapse quizlet?

Why Did the Tacoma Narrows Bridge Collapse in 1940? It collapsed because the wind created a standing wave that got higher and higher on the bridge. The key ingredient to a standing wave is resonance, when the driving frequency (of the wind) matches the natural frequency (of the bridge).

What year did the Tacoma Narrows Bridge collapse?

The bridge cost $6.4 million; tolls started at 55 cents and were cut to 50 cents two months later when the bonds were refinanced.

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What replaced the Tacoma Narrows Bridge?

The failed 1940 Tacoma Narrows Bridge was replaced in 1950 by a new span stiffened with a web truss. To address growing congestion, a parallel bridge south of the original opened in 2007; the 1950 bridge now has four lanes of westbound traffic and the 2007 bridge four lanes of eastbound traffic.

What is the dead load of a bridge?

Dead load refers to the weight of the bridge itself. Like any other structure, a bridge has a tendency to collapse simply because of the gravitational forces acting on the materials of which the bridge is made.

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