城市桥梁设计中,20~50米范围内的中等跨度连续梁桥,因其布局灵活,经济适用、行车舒适等特点,在城市桥梁设计中被广泛采用。本文以现行设计及施工规范、标准为主要依据,并融合吸纳了多家国内大型设计院的桥梁设计经验和成果,对应用较广泛的50米以下中等跨度的普通钢筋混凝土连续箱梁、预应力混凝土连续箱梁、顶推连续梁、钢箱连续梁桥等设计关键指标进行了统计梳理,并就构造尺寸拟定、结构计算内容要求等进行了详细的阐述,对提高桥梁设计工作效率、桥梁设计者的技术水平具有一定的指导意义。 In the design of urban bridges, the medium-span continuous girder bridges in the range of 20-50 meters are widely adopted in the design of urban bridges because of their flexible layout, economical application and comfortable driving. In this paper, the current design and construction specifications and standards are the main basis for the design of the bridge. The experience and achievements of the bridge design of a large number of design institutes in China are also incorporated. For prestressed concrete continuous box girders with medium span of less than 50 meters, Concrete continuous box girder, push-in continuous girder, steel box continuous girder bridge and other key design indicators were combed, and the construction dimensions, structure calculation content requirements were described in detail to improve the bridge design efficiency, bridge design The technical level of a certain degree of guiding significance.