外文翻譯---斜拉橋體系-在線瀏覽
2024-10-02 17:10本頁面
【正文】 after a substantial deformation of the girder took place. This may explain why the renewed application of the cablestayed system was possible only under the following conditions:(1) The correct analysis of the structural system.(2) The use of tension members having under dead load a considerable degree of stiffness due to high prestress and beyond this still sufficient capacity to acmodate the live load.(3) The use of erection methods which ensure that the design assumptions are realized in an economic manner.The renaissance of the cablestayed system, however, was finally successfully achieved only during the last decadeModern cablestayed bridges present a threedimensional system consisting of stiffening girders, transverse and longitudinal bracings, orthotropictype deck and supporting parts such as towers in pression and inclined cables in tension. The important characteristics of such a threedimensional structure is the full participation of the transverse construction in the work of the main longitudinal structure. This means a considerable increase in the moment of inertia of the construction which permits a reduction in the depth of the girders and economy in steel.The introduction of the cablestayed system is a true pioneering development in bridge architecture. Existing cablestayed bridges are masterpieces of steel construction. They are pleasing in outline, clean in their anatomical conception and totally free of meaningless ornamentation. This is because the design of
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