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利用ABAQUS有限元软件分析了碳纤维布加固局部强度不足混凝土柱的受力性能。对加固前后不同区域混凝土的变形情况和应力-应变关系曲线、钢筋和箍筋的变形情况和应力-应变关系曲线以及混凝土柱整体的荷载-位移曲线做对比分析。研究结果表明,碳纤维布对加固区域混凝土可以产生明显的约束作用,增强混凝土柱整体抵抗变形的能力。对局部强度不足区域的混凝土裂缝发展有明显的抑制作用,可小幅度的提高混凝土柱的极限承载力。当碳纤维布层数超过3层时,增加层数仅对混凝土柱延性性能有影响,对其承载力的提高无明显作用。
ABAQUS finite element software was used to analyze the mechanical behavior of concrete columns strengthened with CFRP. The deformation and stress-strain curves of concrete in different regions before and after reinforcement, the deformation and stress-strain curves of steel bars and stirrups, and the load-displacement curves of concrete columns were compared and analyzed. The research results show that the carbon fiber cloth can significantly restraint the concrete in the reinforced area and enhance the overall resistance of concrete columns to deformation. It can significantly inhibit the concrete crack development in the area with insufficient local strength and increase the ultimate bearing capacity of the concrete column with small amplitude. When the number of carbon fiber cloth layers exceeds 3, the increase of the number of layers affects only the ductility of concrete columns, and has no significant effect on the increase of the bearing capacity.