基于工业化建造的整体预制连续架设型钢—混凝土组合梁设计

钢-混凝土组合梁便于实现预制装配化,是一种与工业化建造要求相适应的桥型.基于工业化建造思路,采用最大高度1.1 m左右的重型H 型钢,提出了一种整体预制、连续架设的型钢-混凝土组合梁.以5×30m 连续梁为例,介绍了设计构思、结构构造和施工步骤,通过计算分析研究了结构受力性能,包括结构承载力、整体稳定、局部稳定、刚度、桥面板横向受力以及负弯矩区裂缝宽度.型钢-混凝土组合梁工厂制造效率高,现场施工速度快,受力性能良好,具有很强的经济性和竞争力.通过采取适当的结构措施,其跨径可在30 m 的基础上进一步扩展.

Design of Integral Prefabricated Continuous Erection Shaped Steel-concrete Composite Girder Based on Industrialized Construction

The steel-concrete composite girder is easy to be prefabricated and assembled, and is a kind of bridge adapted for the requirements of industrialized construction. Based on the industrialized construction thinking, the H-steel with the maximum height of 1.1m or so is used. An integral prefabricated continuous erection shaped steel-concrete composite girder is proposed. Taking 5×30 continuous girder as an example, the design concept, structural construction and construction steps are introduced. The mechanical performances of structure are calculated, analyzed and studied including the bearing capacity, integral stability and rigidity of structure, and the lateral stress of bridge deck and the crack width of hogging moment area. The shaped steel-concrete composite girder has the strong economic efficiency and competitive power because of its high factory manufacturing efficiency, fast field construction speed and good stress performance. By taking the proper structural measures, its span can be further extended on the basis of 30 m.