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结合既有运营铁路上8 m跨度低高度钢筋混凝土梁加固工程实例,采用有限元方法和现场实测数据,研究粘贴钢板和体外预应力加固技术在释放混凝土受压区过大的压应力,提高小跨度低高度钢筋混凝土梁竖向刚度和抗弯承载力等方面的适用性,并提出体外预应力加粘贴钢板综合加固技术,可为同类桥梁的加固设计与施工提供参考。
Combined with the existing 8m-span low-height reinforced concrete girder reinforcement project in existing railway, finite element method and field measurement data are used to study the effect of bonded steel plate and external prestressing reinforcement technology on the release of excessive compressive stress in the concrete compression zone, The vertical rigidity and flexural capacity of reinforced concrete beams with low span, the applicability of external prestressed and integrated steel plate reinforcement technology can provide reference for the reinforcement design and construction of similar bridges.