钢骨钢管混凝土在单柱式桥墩中的应用研究

Application Research on Circular Steel Tube Composite Short Column Filled with Steel Reinforced Concrete in Single Column Pier

受压状态下的钢骨钢管混凝土柱,外围混凝土对内部钢管有一定的紧箍力,钢管又对内部混凝土有环向压力,使得核心混凝土处于三相受压状态,从而提高构件的整体刚度和极限承载力。根据结构的这种工作机理,从正截面承载能力研究出发,提出了把这种结构应用到桥梁的柱式桥墩上的构想,从而解决单柱式桥墩墩身截面粗大的问题,增加桥下使用空间。在施工工艺上简化柱内钢筋笼的制作,节省人力资源。

Under the condition of the pressure of circular steel tube composite short column filled with steel reinforced concrete, concrete surrounding the steel on the inside have a certain confining force, the internal concrete pipe has a ring to the pressure, making the core concrete in the three-phase compression, so as to enhance the overall member stiffness and ultimate bearing capacity. According to the structure of the working mechanism, from the study on the bearing capacity of normal section, put forward the structure of the bridge pier column type to the idea, to solve the batch type bridge pier cross-section bulky, increased use of space bridge. Simplify the construction process on the production of column reinforcement cage, saving human resources.