外文翻譯---斜拉橋體系-展示頁(yè)
2024-09-06 17:10本頁(yè)面
【正文】 orthotropic steel decks. (3) Experience with previously built bridges containing basic elements of cablestayed bridges. (4) Application of high strength steels new methods of fabrication and erection. (5)The ability to analysis such structures through model studies.BASIC CONCEPTS The application of inclined cables gave a new stimulus to construction of large bridges. The importance of cablestayed bridges increased rapidly and within only one decade they have bee so successful that they have taken their rightful place among classical bridge systems. It is interesting to note how this development which has so revolutionized bridges construction, but which in fact is no new discovery, came out. The beginning of this system, probably, may be traced on back to the time when it was realized that rigid structures could be formed by joining triangles together. Although most of these earlier designs were based on sound principles and assumptions，the girder stiffened by inclined cables suffered various misfortunes which regrettably resulted in abandonment of the system. Nevertheless, the system in itself was not at all unsuitable. The solution of the problem had unfortunately been attempted in the wrong way. On the one hand, the equilibrium of these highly indeterminate systems dad not been clearly appreciated and controlled, and on the other, the tension members were made of timber, round bars or chains. They consisted therefore of lowstrength material which was fully stressed only
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