土木工程外文翻译

1、 本科毕业设计外文资料翻译 1 英文题目：Talling building and Steel construction2 中文题目：高层结构与钢结构学院（部）： 土木建筑学院专业班级： 学生某： 指导教师： 某X助教2012年 06 月 02 日外文资料Talling building and Steel constructionAlthough there have been many advancements in building construction technology in general. Spectacular archievements have been made in the design and construction of ultrahigh-rise buildings.The early development of high-rise buildings began with structural steel framing.Reinforced concrete and stressed-skin tube systems have since

2、 been economically and petitively used in a number of structures for both residential and mercial purposes.The high-rise buildings ranging from 50 to 110 stories that are being built all over the United States are the result of innovations and development of new structual systems.Greater height entails increased column and beam sizes to make buildings more rigid so that under wind load they will not sway beyond an acceptable limitExcessive lateral sway may cause serious recurring damage to parti

3、tions,ceilings.and other architectural details. In addition,excessive sway may cause disfort to the occupants of the building because their perception of such motion.Structural systems of reinforced concreteas well as steeltake full advantage of inherent potential stiffness of the total building and therefore require additional stiffening to limit the sway.In a steel structurefor examplethe economy can be defined in terms of the total average quantity of steel per square foot of floor area of th

4、e buildingCurve 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 column-and-beam frameStructural engineers have developed structural systems with a view to eliminating this premium.Systemsin steel. Tall buildings in steel developed as a

5、 result of several types of structural innovations. The innovations have been applied to the construction of both office and apartment buildings.Frame with rigid belt trusses. In order to tie the exterior columns of a frame structure to the interior vertical trussesa system of rigid belt trusses at mid-height and at the top of the building may be used. A good example of this system is the FirstWisconsinBankBuilding(1974) in Milwaukee.Framed tube. The maximum efficiency of the total structure of

6、a tall building, for both strength and stiffnessto resist wind load can be achieved only if all column element 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 43-story reinforced concrete DeWitt Chestnut Apartment Building in Chicago. The most significant use of this system is in the twin structural steel towers of the 110-story W

7、orldTradeCenter building in New YorkColumn-diagonal 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 connecting them with diagonal members interesting at the centre line of the columns and beams. This simple yet extremely efficient system was used for the first time on the John Hancock Centre in Chicago, using as much steel as is normally needed for a traditional 40-story building.Bundled tubeWith the continuing need

8、for larger and taller buildings, the framed tube or the column-diagonal truss tube may be used in a bundled form to create larger tube envelopes while maintaining high efficiency. The 110-story Sears Roebuck Headquarters Building in Chicago has nine tube bundled at the base of the building in three rows. Some of these individual tubes terminate at different heights of the building, demonstrating the unlimited architectural possibilities of this latest structural concept. The Sears tower, at a he

9、ight of 1450 ft(442m), is the worlds tallest building.Stressed-skin tube system. The tube structural system was developed for improving the resistance to lateral forces (wind and earthquake) and the control of drift (lateral building movement ) in high-rise building. The stressed-skin tube takes the tube system a step further. The development of the stressed-skin tube utilizes the faade of the building as a structural element which acts with the framed tube, thus providing an efficient way of resisting lateral loads in high-rise buildings, and resulting in cost-effective column-free interior space with a high ratio of net to gross floor area.Because of the contribution of the stressed-skin faade, the framed members of the tube require less mass, and are thus lighter and less expensive. All the typical columns and spandrel beams are standard rolled shapesminimizing the use and cost of special built-up members. The dept

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