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为分析FRP开孔板孔径大小对FRP与混凝土之间连接作用的影响,通过对6组17个不同开孔孔径的FRP开孔板与混凝土连接件进行拔出试验,研究了孔径对模型试件极限承载力和破坏形式的影响,提出了考虑开孔板应力集中的FRP开孔板与混凝土连接件极限承载力的计算公式.研究表明:FRP开孔板与混凝土连接件可以有效增加FRP与混凝土之间的连接作用;随着FRP开孔板孔径的增加,模型试件的极限承载力先增大后减少,破坏形式由孔内混凝土剪切破坏转换成FRP开孔板沿孔边拉伸破坏;提出的公式可以有效预测试件的破坏形式和极限承载力.
In order to analyze the influence of the aperture of FRP perforated plate on the connection between FRP and concrete, six groups of 17 FRP perforated plates with different aperture and concrete connector were pulled out. The effects of aperture on the model test piece The ultimate bearing capacity and the form of failure, the formula for calculating the ultimate bearing capacity of FRP perforated plate and concrete joint considering the stress concentration of perforated plate is proposed.The results show that the FRP perforated plate and concrete joint can effectively increase the FRP and concrete With the increase of aperture of FRP perforated plate, the ultimate bearing capacity of the model specimen firstly increases and then decreases, and the failure mode is changed from shear failure of concrete in the hole to tensile failure of the FRP perforated plate along the hole The proposed formula can effectively predict the failure mode and ultimate bearing capacity of specimens.