初始缺陷对钢管混凝土拱肋极限承载力的影响

Influence of Initial Defects on Ultimate Bearing Capacity of Concrete Filled Steel Tube Arch Ribs

钢管混凝土拱桥的拱肋在钢管预制、运输、吊装及混凝土灌注的过程中,会受到各种因素的影响出现不同类型的初始缺陷。本文就初始几何缺陷对中小跨径哑铃型截面钢管混凝土拱肋极限承载力的影响进行了研究。结果表明初始几何缺陷对极限承载力的影响比较明显,需在施工过程中予以重视并加以控制。本文结论可为同类型桥梁的设计和施工提供参考。

In the process of steel pipe prefabrication,transportation,hoisting and concrete pouring,the arch rib of concrete filled steel tube bridge will be affected by various factors and appear different types of initial defects.In this paper,the influence of initial geometric defects on the ultimate bearing capacity of concrete filled steel tube arch rib with small and medium span dumbbell section is studied.The results show that the influence of initial geometric defects on the ultimate bearing capacity is obvious,which needs to be paid attention to and controlled in the construction process.The conclusions of this paper can provide reference for the design and construction of the same type of bridge.