Corrosion of stirrups can be a major factor in the degeneration of seismic behavior for reinforced concrete (RC) structures. In this work, low-cycle loading tests were conducted on six rectangular RC beam specimens at joints with different stirrups corrosion levels. The failure modes, hysteretic curves, skeleton curves, stiffness degradation curves, ductility factor, energy dissipation and bearing capacity of RC specimens are compared and discussed. Meanwhile, the influence of corrosion cracks on mechanical properties of members was also investigated. Experimental results show that with an increase of stirrup corrosion level, the energy dissipation capacity and plastic deformation capacity dropped significantly. For specimens with a lower corrosion level of stirrups, though, the energy dissipation reduced gradually and the ductility factor increased slightly, indicating that slight corrosion of stirrups improved the ductility of specimens. However, the energy dissipation and ductility coefficient declined remarkably as the stirrup corrosion level increased. Compared with the uncorroded specimen, the ductility factor and energy dissipation decreased observably, by 22.5% and 34.5%, respectively, for specimen with stirrup corrosion level of 15.4%. Furthermore, the failure modes gradually changed from ductile bending failure to brittle failure as the corrosion level of stirrups continuously increased. The disadvantageous influence of stirrup corrosion degree larger than 15.4% in RC structures should be considered in their seismic analysis.

箍筋的腐蚀可能是钢筋混凝土（RC）结构抗震性能退化的主要因素。在这项工作中，在六个箍筋锈蚀程度不同的接头处，对六个矩形RC梁试件进行了低周荷载测试。比较并讨论了钢筋混凝土试件的破坏模式，滞回曲线，骨架曲线，刚度退化曲线，延性因子，能量耗散和承载力。同时，还研究了腐蚀裂纹对构件力学性能的影响。实验结果表明，随着箍筋腐蚀程度的增加，其能量耗散能力和塑性变形能力明显下降。但是，对于具有较低箍筋腐蚀水平的试样，能量耗散逐渐降低，延性系数略有增加，表明箍筋的轻微腐蚀提高了标本的延性。但是，随着箍筋腐蚀程度的增加，能量耗散性和延性系数显着下降。与未腐蚀的试样相比，箍筋腐蚀水平为15.4％的试样的延展性因子和能量耗散分别下降了22.5％和34.5％。此外，随着箍筋的腐蚀水平不断提高，失效模式从韧性弯曲失效逐渐变为脆性失效。在钢筋混凝土结构的地震分析中，应考虑箍筋腐蚀度大于15.4％的不利影响。表明箍筋的轻微腐蚀改善了样品的延展性。但是，随着箍筋腐蚀程度的增加，能量耗散性和延性系数显着下降。与未腐蚀的试样相比，箍筋腐蚀水平为15.4％的试样的延展性因子和能量耗散分别下降了22.5％和34.5％。此外，随着箍筋的腐蚀水平不断提高，失效模式从韧性弯曲失效逐渐变为脆性失效。在钢筋混凝土结构的地震分析中，应考虑箍筋腐蚀度大于15.4％的不利影响。表明箍筋的轻微腐蚀改善了样品的延展性。但是，随着箍筋腐蚀程度的增加，能量耗散性和延性系数显着下降。与未腐蚀的试样相比，箍筋腐蚀水平为15.4％的试样的延展性因子和能量耗散分别下降了22.5％和34.5％。此外，随着箍筋的腐蚀水平不断提高，失效模式从韧性弯曲失效逐渐变为脆性失效。在钢筋混凝土结构的地震分析中，应考虑箍筋腐蚀度大于15.4％的不利影响。箍筋腐蚀水平为15.4％的试样的延性因子和能量耗散分别下降了22.5％和34.5％。此外，随着箍筋的腐蚀水平不断提高，失效模式从韧性弯曲失效逐渐变为脆性失效。在钢筋混凝土结构的地震分析中应考虑箍筋腐蚀度大于15.4％的不利影响。箍筋腐蚀水平为15.4％的试样的延性因子和能量耗散分别下降了22.5％和34.5％。此外，随着箍筋的腐蚀水平不断提高，失效模式从韧性弯曲失效逐渐变为脆性失效。在钢筋混凝土结构的地震分析中，应考虑箍筋腐蚀度大于15.4％的不利影响。