下承式预应力桁架拱桥加固改造研究

Research on the Reinforcement and Reconstruction of Through Pre-stressed Truss Arch Bridge

以某大桥为工程实例,阐述了下承式预应力桁架拱桥的常见病害及产生原因,运用结构计算软件,优选拱肋、斜撑、系梁等构件的加固方法,结果表明:采用粘贴型钢加固拱肋、斜撑,粘贴碳纤维布加固系梁能有效的提高大桥的刚度和承载能力。

This paper takes a bridge as an engineering example, expounds the common diseases of through prestressed truss arch bridge and their causes. It uses structure calculation software to optimize the reinforcement methods of components, such as arch rib, diagonal brace, tie beam, etc. The results show that pasting steel for arch rib, diagonal brace and pasting carbon fiber sheet for tie beam can effectively enhance the stiffness and the carrying capacity of bridge.