摘 要：钢筋锈蚀是混凝土构件主要病害之一。与梁底纵筋相比，箍筋易首先腐蚀，且腐蚀程度更为严重。本文在研究锈蚀RC构件抗剪承载力衰减模型的基础上，借助Monte Carlo模拟，分析了钢筋锈蚀对RC梁抗剪承载力的影响。结果表明，箍筋的锈蚀率明显大于纵筋，构件抗剪失效的可能性大大增加，对梁的安全性和耐久性具有潜在危害。
Abstract: The corrosion of steel bar is a grave faults for RC menbers. Compared with longitudinal bars at the bottom of beams, the stirrups are usually corroded at the first and the corrosion degree is more serious. Based on investigation of the model of declinning of shear-bearing capacity of corroded RC beams, and by means of Monte Carlo simulation, the influence of corrosion on shearing capacity of RC beams is analysed. The rezults show that the corrosion rate of stirraps is obviously larger than that of longitudinal bars, and the possibility of failure by shearing is greatly increased. That will potentially endanger to safety and durability of RC beams.