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簡介：《清明上河圖》畫面正中的那座橋，形若彩虹，被稱為“虹橋”。這種橋使用短的構造材料，卻形成了大的跨度，被認為是中國在世界橋梁史上的獨特創造。然而隨著北宋的覆亡，這座橋連同乾涸淤死的汴河河道，一齊湮滅了。20世紀70年代至80年代初，在浙江南部和福建的東北部，發現了大量與《清河上河圖》中“虹橋”結構相似的木拱橋，當地人稱之為“廊橋”。這種橋究竟具有什麼樣的力學原理？它是否就是《清明上河圖》中的“虹橋”呢？收起
《虹橋尋蹤》
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