论文部分内容阅读
一、概述1958年大跃进以来,一些通航河流和大运河上要求建造通航净空50米、净高7米的大跨径桥梁。由于基础地质和两岸地形等条件的支配,有些桥型需采用梁式。大跨径梁桥当以箱形为经济合理,因箱形梁由于整个上部构造形成一根空心梁,桥面版(即顶版)与梁肋和底版作为一个箱形整体承受任何布置的活载,具有刚度大、自重轻的优点,如再采用连续梁或悬臂梁,更可节省材料。这次合肥大桥设计组设计的箱形梁桥共有四
I. Overview After the Great Leap Forward in 1958, some navigable rivers and the Grand Canal demanded the construction of a large-span bridge with a navigation clearance of 50 meters and a net height of 7 meters. Due to the basic geology and the cross-Strait topography and other conditions, some bridge type to be used beam. The long-span girder bridge is economically justified by the box shape, since the box girder forms a hollow beam due to the entire upper structure. The deck (ie, the top plate) and the beam ribs and soleplate withstand any arrangement as a single box Contains the advantages of large stiffness, light weight, such as the use of continuous beams or cantilevers, but also save material. The Hefei Bridge design team designed a total of four box girder bridge