预应力钢与混凝土组合连续梁的设计实践——44m+64m+44m阜成路立交主桥

Design and Practice of Continous Box Girder Bridge of Prestressed Steel and Concrete Composite——An Intersection Bridge of Fucheng Road with 44m+66m+44m

本文论述了跨径为44m+64m+44m三跨预应力钢与混凝土组合连续箱梁在分跨、分段、横向分箱、梁高等方面有别于其他连续梁的特点;论述了该桥施加预应力的目的、手段、束的配置与预应力度的掌握;还介绍了该桥的加劲、隔板、抗剪联接件、现浇组合桥面板等的设计与构造。此桥的桥型及跨度为目前国内之首。

In this paper is discussed a 3-span continons box girder bridge of prestressed steel and concrete composie, the total span of which is 44m+66m+44m. Its characteristics different from other are the division of spans, sections, transverse boxes and the height of girder, etc. In this paper, the author also expounds the purpose and method of prestres-sing for such bridge, the layout of prestressing strands and the handling of prestressing. Further, the design and construction of stiffing plates, separators, shearing connectors, in-situ composite floor, etc. for such bridge are introduced. Its pattern and span are first constructed in China till now.