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为了给纤维增强聚合物(FRP)加固腐蚀环境下钢筋混凝土圆柱的设计和施工提供参考,促进FRP加固钢筋混凝土圆柱的应用,本文通过加速腐蚀得到类似实际环境中已锈损钢筋混凝土圆柱,然后采用碳纤维增强聚合物(CFRP)条带和玻璃纤维增强聚合物(GFRP)条带分别对锈蚀钢筋混凝土圆柱进行加固,最后对加固后圆柱进行轴心受压试验,重点研究钢筋锈蚀率、FRP层数和种类对钢筋混凝土圆柱受压承载力的影响;基于对FRP条带间隔约束效应、钢筋锈蚀对混凝土截面及钢筋力学性能影响的研究与分析,提出FRP条带间隔约束锈蚀钢筋混凝土圆柱轴心受压承载力计算模型。试验实测值与模型计算值之比的平均值1.020,变异系数0.063,二者符合较好。
In order to provide a reference for the design and construction of reinforced concrete columns reinforced with FRP in corrosive environments and to promote the application of FRP to reinforce reinforced concrete columns, a corrosive reinforced concrete column similar to the actual environment was obtained by accelerated corrosion, (CFRP) strips and glass fiber reinforced polymer (GFRP) strips were used to reinforce the corroded reinforced concrete columns respectively. Finally, the axial compressive tests were carried out on the strengthened columns, with emphasis on the corrosion rate of steel bars, the number of FRP layers Based on the study of the restraint effect of FRP strip spacing and the influence of steel corrosion on the concrete section and the mechanical properties of reinforced concrete, the paper puts forward that the FRP strip spacing constrained corroded reinforced concrete column axial center Compressive bearing capacity calculation model. The average value of the ratio between the measured value of the experiment and the calculated value of the model is 1.020 and the coefficient of variation is 0.063, which is in good agreement with each other.