钢混组合箱梁桥结构特性及关键设计难题研究

Study on Structural Properties and Critical Design Problems of Steel-concrete Composite Box Girder Bridge

钢混组合箱梁桥延续了箱型梁抗弯及抗扭性能好、受力优异等特点,结合了钢材和混凝土各自的力学性能优势,在近年来我国工程建设中受到广泛关注。详细论述了钢混组合箱梁桥的结构特点,重点对其关键设计难题进行了剖析,包括钢混及其连接构造、负弯矩区处理、结构整体稳定及局部屈服等问题,提出了解决措施和方法,以供设计参考。

The steel-concrete composite box girder bridge inherits the characteristics of good bending and torsional properties,and excellent stress of box girder,and has the advantage of the mechanical performances of steel and concrete.In recent years,its attention is widely paid in the engineering construction of China.This paper discusses the structural features of steel-concrete composite box girder bridge in detail,analyzes its critical design problems including the steel-concrete connection,design of hogging moment zone,structural overall stability and local buckling,and puts forward the relevant countermeasures and methods referred for the similar designs.