外文翻譯---混凝土梁橋的結(jié)構(gòu)形式-在線瀏覽
2024-07-24 09:11本頁(yè)面
【正文】 using the cantilever method .The tensioned cables not only 5 provide a vertical reaction ponent to support the deck ,but also introduce horizontal pression to the box girders ,adding to the posttensioning force in those members . Stressribbon Bridge pioneered many years ago by the German engineer Ulrich Finsterwalder. The stressribbon bridge carries a pipeline and pedestrians over the Rhine River with a span of 446 ft .The superstructure erection sequence was to (a) erect two pairs of cables, (b) place precast slabs forming a sidewalk deck and a U under each of the sets of cables, and (c) castinplace concrete within the two Us. The pipeline is placed atop supports at railing height, off to one side, which greatly increases the wind speed of the structure. It is appropriate in discussing bridge forms to mention structural esthetics .The time is past when structures could be designed on the basis of minimum cost and technical advantages alone .Bridge structures in particular are exposed for all to see .To produce a structure that is visually offensive ,as has occurred all too often in the past, is an act professional irresponsibility .Particularly for major spans ,but also for more ordinary structures ,architectural advice should be sought early in conceptual stage of the design process. 。生產(chǎn)視覺(jué)上不愉快的結(jié)構(gòu) , 過(guò)去經(jīng)常發(fā)生 , 是一種不負(fù)專業(yè)責(zé)任的行為。當(dāng)結(jié)構(gòu)可能根據(jù)最小的費(fèi)用和技術(shù)設(shè)計(jì)的時(shí)候，時(shí)間消逝了。放置在頂部的管道支撐在扶手的頂部，向一邊傾斜， 大幅地增加結(jié)構(gòu)的主要風(fēng)速。 壓帶是 橋運(yùn)輸跨越萊茵河的一個(gè)管道和人行 道，跨徑 446 英尺 。受拉的懸索不僅提供一種垂直反應(yīng)組成支撐底板，而且對(duì)于箱梁產(chǎn)生水平的壓縮，增加構(gòu)件中的張拉力。一個(gè)值得注意的例子是阿根廷境內(nèi)的 ChacoCorrientes 橋。該橋的中間跨度 550 英尺，側(cè)跨跨度 390 英尺，初步設(shè)計(jì)已經(jīng)完成。 想象的工程學(xué)藉著許多特別的技術(shù)示范已經(jīng)延長(zhǎng)混凝土建筑的范圍，就橋梁而言，已經(jīng)遠(yuǎn)遠(yuǎn)超過(guò)幾年以前可以想象的到的
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