某预应力混凝土连续箱梁组合加固方法研究

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摘  要：某高速预应力混凝土连续箱梁受损后，上部结构出现大量结构性裂缝。桥梁特殊检查结果表明，梁体跨中抗弯承载能力不满足要求，刚度明显降低，通过体外预应力等组合加固方式，可有效提高主梁承载能力及刚度。

关键词：连续箱梁；组合加固；体外预应力；加固设计；混凝土

中图分类号：U448.14      文献标志码：A          文章编号：2095-2945（2023）20-0137-05

Abstract： After a high-speed prestressed concrete continuous box girder is damaged， a large number of structural cracks appear in the superstructure. The results of special inspection of the bridge show that the bending bearing capacity of the beam in the middle span does not meet the requirements， and the stiffness is obviously reduced， effectively improving the bearing capacity and stiffness of the main beam.

Keywords： continuous box girder; combined reinforcement; external prestress; reinforcement design; concrete

预应力混凝土连续梁桥具有整体性好、结构刚度大、变形小、抗震性能好、适用于弯桥、桥面伸缩缝少和行车舒适等优点[1]。（剩余5530字）