高層建筑外文翻譯(2)-建筑結(jié)構(gòu)(編輯修改稿)
2025-02-24 01:15 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 rage quantity of steel per square foot of floor area of the building. Curve A in Fig. 1 represents the average unit weight of a conventional frame with increasing numbers of stories. Curve B represents the average steel weight if the frame is protected from all lateral loads. The gap between the upper boundary and the lower boundary represents the premium for height for the traditional columnandbeam frame。 Structural engineers have developed structural systems with a view to eliminating this premium. Systems in steel. Tall buildings in steel developed as a result of several types of structural innovations. The innovations have been applied to the construction of both office and apartment buildings. Frames with rigid belt trusses. In order to tie the exterior columns of a 4 frame structure to the interior vertical trusses, a system of rigid belt trusses at midheight and at the top of the building may be used. A good example of this system is the First Wisconsin Bank Building (1974) in Milwaukee. Framed tube. The maximum efficiency of the total structure of a tall building, for both strength and stiffness, to resist wind load can be achieved only if all column elements can be connected to each other in such a way that the entire building acts as a hollow tube or rigid box in projecting out of the ground. This particular structural system was probably used for the first time in the 43story reinforced concrete DeWitt Chestnut Apartment Building in Chicago. The most significant use of this system is in the twin structural steel towers of the 110story World Trade Center building in New York. Columndiagonal truss tube. The exterior columns of a building can be spaced reasonably far apart and yet be made to work together as a tube by con
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