倫敦塔橋Tower Bridge

Tower Bridge (built 1886-1894) is a combined bascule and suspension bridge in London, over the River Thames. It is close to the Tower of London, from which it takes its name. The bridge consists of two towers tied together at the upper level by means of two horizontal walkways, designed to withstand the horizontal forces exerted by the suspended sections of the bridge on the landward sides of the towers. The vertical component of the forces in the suspended sections and the vertical reactions of the two walkways are carried by the two robust towers. The bascule pivots and operating machinery are housed in the base of each tower. The bridge's present colour scheme dates from 1977, when it was painted red, white and blue for the Queen Elizabeth II's silver jubilee. Originally it was painted a mid greenish-blue colour.

倫敦塔橋（建于1886—1894年）位于倫敦泰晤士河上，是一座浮橋和吊橋相結(jié)合的大橋。它離倫敦塔很近，名字也是由此而來的。倫敦塔橋依靠橋上兩個水平的通道將塔橋的兩個塔連在了一起，之所這樣設(shè)計是為了減輕向陸地延伸的兩個塔的懸空部分所施加的水平壓力。懸空部分壓力的垂直力和兩個通道的垂直反作用力是由兩個穩(wěn)健的塔來共同承擔的。活動結(jié)構(gòu)軸心和操縱裝置覆蓋在每個塔橋的地基里。塔橋現(xiàn)在呈現(xiàn)的色調(diào)是在1977年才開始使用的，當時是因為英國女王伊莉莎白二世的二十五周年紀念而被染成了紅色、白色和藍色。它最初的色調(diào)是藍綠相間的。