锈蚀钢筋混凝土梁碳纤维加固后抗剪承载力有限元分析

Finite element analysis of shear capacity of corroded reinforced concrete beams strengthened with carbon fiber

应用ABAQUS有限元分析软件,考虑箍筋锈蚀对其截面、屈服强度、以及箍筋和混凝土之间粘结滑移的影响,建立了锈蚀钢筋混凝土梁碳纤维布(CFRP)加固后抗剪承载力模型,并通过试验结果验证了有限元模型的正确性。利用有限元模型研究剪跨比、箍筋间距、碳纤维布的宽度和间距等参数对锈蚀梁承载力的影响规律。研究结果表明:剪跨比和箍筋间距的增大均使梁斜截面承载力下降,碳纤维布的宽度和间距比值越大,加固效果越好。

Considering the influence of stirrup corrosion on the cross section, the yield strength and the bond slip between concrete and stirrups, the corroded reinforced concrete beam with carbon fiber cloth （ CFRP ） reinforced shear capacity model was established by the finite element analysis software ABAQUS, and the correctness of the finite element model was verified by the test results. The influence law of shear span ratio, stirrup spacing and width and spacing of CFRP on the bearing capacity of corroded beams was studied by using the finite element model. The results showed that the increase of shear span ratio and stirrup spacing both decrease the bearing capacity of the inclined section of the beam, and the greater the ratio of width and spacing of CFRP, the better the reinforcement effect.