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建立了一种结合纤维复合增强材料(简称FRP)和柔性混凝土拱圈的新型装配式圬工拱桥体系,并获得专利授权,相对于传统圬工拱桥,该结构体系预制化程度和耐久性得到较大提高,施工难度较低并有着较高施工效率。在前期研究基础上,为提高该预制结构承载能力及变形能力,采用FRP布对拱腹进行粘贴,延缓拱体内拱块之间分离。研究中通过结构试验对两座新型圬工拱桥模型进行了极限承载力试验,以验证外贴FRP材料对该预制拱桥结构性能的影响,包括拱轴线线形、拱腹FRP布应力和结构承载力等。试验结果表明,外贴FRP布的结构极限承载力明显提升,破坏形态为FRP布剥离后拱块相互滑移开裂和远加载端拱脚开裂。最后通过建立Midas/Civil有限元模型进行计算分析得知,新型拱桥极限承载力远大于传统圬工拱桥。
A new type of fabricated arch bridge system with fiber reinforced composite (FRP) and flexible concrete arch was established and patented. Compared with the traditional arch bridge, the degree of prefabrication and durability of the system were improved Large increase, less difficult construction and high construction efficiency. Based on the previous studies, in order to improve the carrying capacity and deformation capacity of the prefabricated structure, the FRP cloth is used to paste the soffit to delay the separation between the arches in the arch. In this study, the ultimate bearing capacity of two new arch bridge models was tested by structural tests to verify the effect of externally applied FRP on the structural performance of the prefabricated arch bridge, including arch axis, soffit fabric soffit and structural capacity . The experimental results show that the ultimate bearing capacity of FRP cloth is obviously improved, and the failure mode is that FRP cloth is peeled off to cause the mutual slip and cracking of the arch blocks and cracking of the arch ends at the far loading end. Finally, through the establishment of Midas / Civil finite element model, the calculation and analysis show that the ultimate bearing capacity of the new arch bridge is much larger than that of the traditional arch bridge.