钢与混凝土组合弯梁桥不同施工方法对结构内力的影响

Influences of Difference Construction Methods of Steel and Concrete Composite Camber Beam Bridge on Internal Force of Structure

摘要:

随着经济和交通建设的发展，组合弯梁桥逐渐成为城市桥梁建设中的优选桥型。组合弯梁桥与直桥的受力特点不同，不同的施工方法涉及不同的体系转换问题，因此施工方法的选择会对结构的力学性能产生影响。基于组合弯梁桥的三种施工方法——先简支后连续、先支点后跨中和满堂支架施工，通过有限元软件模拟不同施工方法的施工过程，研究了不同施工方法对组合弯梁桥结构力学性能的影响，针对预制组合弯梁桥提出合理主梁、横梁施工方法，对组合弯梁桥从结构受力角度选择合理的主梁施工方法具有指导意义。

Abstract:

With the development of economic and transportation construction, the composite camber beam bridge has gradually become the preferred bridge type in urban bridge construction. The internal force of composite camber beam bridge is different from that of straight bridge. The different construction method will involve the different system prefabricated combined curved girder bridges are different from those of straight bridges, and the different construction methods involve the different system conversion problems. Therefore, the choice of construction methods will have an impact on the mechanical properties of the structure. Based on the three construction methods of the composite camber beam bridge-first simply supported then continuously supported, first fulcrum then mid-span and full framing construction, the construction process of different construction methods is simulated by finite element software to study the influence of different construction methods on the structural mechanical properties of the composite camber beam bridge. Aiming at the prefabricated composite camber beam bridge, the reasonable construction methods of main girder and cross girder are proposed, which had the guiding significance in the selection of the reasonable construction method of the main girder for the composite camber beam bridge from the viewpoint of structural stresses.