大跨径简支钢-混凝土组合梁桥设计研究

Study on Design of Long-span Simple-supported Steel-concrete Composite Beam Bridge

钢-混凝土组合梁桥可以充分发挥钢材和混凝土各自的优势,具有良好的力学性能和施工性能。基于大跨径简支钢-混凝土组合梁桥设计实例,论述其计算方法及力学性能。此类梁桥在成桥及运营阶段的各部分应力均满足规范要求;后续类似设计中还可考虑采用塑性设计进行比选;临时支撑可以有效改善钢梁受力。简支钢-混凝土组合梁桥具有广阔的应用前景。

The steel-concrete composite beam bridge can fully play the advantages of steel and concrete separately, and has the good mechanical property and construction performance. Based on the design practice of long-span simple-supported steel-concrete composite beam bridge, this paper discusses its calculation method and mechanical property. The partial stresses of this bridge all meet the code requirements in the stages of bridge completion and operation. The following design can still consider the use of plasticity design for comparison. The temporary support can effectively improve the stress of steel beam. The simple-supported steel-concrete composite beam bridge has the wide application prospect.