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考虑纤维编织网表面处理、层数和ECC施工工艺等因素,对FRP编织网/ECC复合增强钢筋混凝土圆柱进行了静力轴向受压试验,研究了加固柱的承载力和变形能力.在试验研究的基础上,利用有限元软件建立了加固柱的数值分析模型.试验结果表明,加固柱的破坏形态为BFRP编织网断裂;随着编织网层数的增加,加固柱的极限荷载和变形性能均有所提高;FRP编织网经过表面处理后,显著地改善了与ECC的界面黏结性能和共同工作性能;涂抹ECC和喷射ECC与FRP编织网形成的复合加固层,均能对核心钢筋混凝土柱提供有效的侧向约束应力,延缓了纵筋的屈服.计算结果表明,利用所建立的非线性有限元模型,可以有效地预测加固柱的极限荷载和受力性能.
Taking into account the surface treatment of fiber braid, the number of layers and ECC construction technology and other factors, the static compression of FRP braided wire mesh / ECC composite reinforced concrete column was carried out, and the bearing capacity and deformation capacity of the reinforced column were studied. Based on the research, the numerical analysis model of reinforced column was established by using finite element software.The experimental results show that the failure mode of reinforced column is fracture of BFRP braid, and as the number of braid layers increases, the ultimate load and deformation performance The FRP braided mesh surface treatment significantly improves the interfacial adhesion properties and common working properties with ECC. The composite reinforced layer formed by the application of ECC and the injection of ECC and FRP braided mesh can improve the performance of the core reinforced concrete column The results show that the nonlinear finite element model can effectively predict the ultimate load and force performance of reinforced columns.