Tacoma Narrows Bridge - Tacoma Narrows Bridge

Japanese: タコマ・ナローズ橋 - タコマナローズきょう(英語表記)Tacoma Narrows Bridge
Tacoma Narrows Bridge - Tacoma Narrows Bridge
Located near Tacoma, Washington, USA, this suspension bridge spans Puget Sound, separating the mainland of Washington from the Olympic Peninsula. Built in 1940, it boasted the third longest span in the world at that time, at 853m. However, on November 7, just four months after it opened, it collapsed due to violent vibrations caused by a moderate wind speed of 19m/s. From the beginning, it was recognized that this bridge would vibrate even in light winds, and this had attracted attention. On the day of the collapse, researchers from the University of Washington were on site, and the entire accident was recorded on film, becoming a valuable resource.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
アメリカ合衆国ワシントン州タコマ市近郊にあり,ワシントン州本土とオリンピック半島を隔てるピュージェット湾に架かるつり橋。1940年に建設され,853mという,当時世界第3位の長支間を誇ったが,開通後わずか4ヵ月経た11月7日,19m/sというさして強くない風速の風を受けて激しい振動を生じ崩壊した。この橋は当初から微風のもとでも振動を生ずることが認められ関心が払われていた。落橋当日もワシントン大学の研究者らが現場に赴いており,事故の経過は逐一映画に記録され,貴重な資料となった。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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