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简介本文首先说明了近年来在一些国家中预应力钢筋混凝土桥的应用情况。对于在桥梁建筑中曾采用过的预加应力方法和结构图式作了综合的介绍。为了具体指明预应力桥的发展情况,列举了一些典型的实际例子。文中所给预应力桥的应用范围虽然系根据国外的资料而得,但仍可供在我国编制设计的参考。文末所提出的四个问题是与修建大跨度预应力钢筋混凝土桥有密切关系的,这些问题是:1)混凝土和钢筋的强度,2)结构形式,3)钢筋形式,4)架设方法。本文原稿承桥梁教研组杨自哲助教帮同整理,特此附谢。
Introduction This paper first describes the application of prestressed concrete bridges in some countries in recent years. A comprehensive introduction to prestressing methods and structural schematics used in bridge construction has been given. In order to specify the development of prestressed bridges, some typical practical examples are given. Although the application scope of the prestressed bridge given in this paper is based on the data from abroad, it is still available for reference in the preparation of design in our country. The four questions raised at the end of this paper are closely related to the construction of large-span prestressed concrete bridges. These problems are: 1) the strength of concrete and steel bar, 2) the structure, 3) the form of reinforcement, and 4) the method of setting up. This original manuscript bridge teaching and research group Yang Zi-zhe assistant to help with the order, I hereby thank you.