Which structural problem afflicted the original Tacoma Narrows Bridge shortly after its 1940 completion?

💡 Explanation

When wind passed the Tacoma Narrows Bridge, aeroelastic flutter (self-excited vibration) occurred because the bridge deck's shape induced lift variations and oscillations. Therefore deck twisting resulted, rather than corrosion, settlement, or slippage, which stem from separate environmental and design flaws.

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