外文翻譯--組合作用的基礎(chǔ)及抗剪連接(已修改)
2025-06-01 06:05 本頁面
【正文】 畢 業(yè) 設(shè) 計(jì)（論 文） 外 文 參 考 資 料 及 譯 文 譯文題目： 學(xué)生姓名： 學(xué) 號(hào)： 專 業(yè)： 所在學(xué)院： 指導(dǎo)教師： 職 稱： 年 月 日 Fundamentals of Composite Action and Shear Connection The evolution of satisfactory design methods for posite beams has been a slow process, requiring much theoretical and experimental work in order39。 to provide economic and, at the same time, safe design criteria. The purpose of this Chapter is to describe in some detail the more important fundamentals which have to be taken into account in the design of posite structures. Historically the first analysis of a posite section was based on the conventional assumptions of the elastic theory which limit the stresses in the ponent 39。materials to a certain proportion of their 39。failure stresses (yield in the case of steel, crushing in the case of concrete). The assumptions inherent in the elastic method are similar to those for ordinary reinforced concrete. In recent39。 years the concepts of the ultimate load design philosophy have been applied to posite action and a body of experimental evidence has shown it to be a safe, economical basis on which to proportion posite sections. Although at the present time ultimate load design methods are directly applicable only to buildings and not to bridges there seems no reason to doubt that in time the restriction will disappear. Before dealing in detail with the two design approaches (elastic and ultimate load) basic points require consideration. A clear understanding of the way in which the ponent materials, steel concrete and shear connection react to applied load is an essential preliminary to full analysis of the posite section. Of primary importance are the stress strains relationships, which must of necessity be the product of carefully controlled experiment. These experimental results are not generally suited to direct application and so simplifications and idealisations are adopted in practice. The use of puters has made it possible to reduce the amount of idealisation required with the result that puter `experiments39。 can now be performed using material stressstrain relationships of considerable plexity. Composite action between steel and concrete implies some interconnection between the two materials which will transfer shear between them. In reinforced concrete members the natural bond of concrete to steel is often sufficient to do this, although cases do arise in which additional anchorage is required. The fully encased filler joist also has a large embedded area which is adequate for full shear transfer. However, the situation is quite different with the mon type of posite beam in which the concrete slab rests on, or at best encloses, the top flange of the steel beam. It is true that there will initially be shear transfer by bond and friction at
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