In order to study the influence of corrosion rate and shear span ratio on reinforced concrete beam, a numerical analysis method of corroded reinforced concrete beam was put forward. Bond-slip relationship formula between reinforcement and concrete was suggested. A three-dimensional finite element model of corroded reinforced concrete beam was established. Calculation method of ultimate bearing capacity for reinforced concrete beam was suggested. Ultimate bearing capacity experiment on 14 corroded reinforced concrete beams with different corrosion rates and shear span ratios was carried out. Numerical analysis results and experimental results were compared and analyzed. The results show that, for reinforced concrete beams with different corrosion rates and shear span ratios, load-deflection curve can be divided into elasticity stage and plasticity stage. With the increase of corrosion rate and shear span ratio, ultimate bearing capacity of corroded reinforced concrete beam decreased. When shear span ratio was 3.0, if corrosion rate increased by 1%, experimental value of ultimate bearing capacity decreased by 1.002 kN. When shear span ratio was 2.4, if corrosion rate increased by 1%, experimental value of ultimate bearing capacity decreased by 1.849 kN. The numerical analysis method put forward in this paper was feasible, and the suggested ultimate bearing capacity calculation method for reinforced concrete beam has a high accuracy.

中文翻译：

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腐蚀速率和剪跨比对钢筋混凝土梁影响的试验与数值研究

为了研究腐蚀速率和剪跨比对钢筋混凝土梁的影响，提出了锈蚀钢筋混凝土梁的数值分析方法。提出了钢筋与混凝土的粘结滑移关系公式。建立了锈蚀钢筋混凝土梁的三维有限元模型。提出了钢筋混凝土梁极限承载力的计算方法。对14种不同腐蚀速率和剪跨比的锈蚀钢筋混凝土梁进行了极限承载力试验。对数值分析结果和实验结果进行了比较和分析。结果表明，对于腐蚀速率和剪跨比不同的钢筋混凝土梁，载荷-挠度曲线可分为弹性阶段和塑性阶段。随着腐蚀速率和剪跨比的增加，锈蚀钢筋混凝土梁的极限承载力下降。当剪切跨度比为3.0时，如果腐蚀速率增加1％，则极限承载力试验值将减少1.002 kN。当剪切跨度比为2.4时，如果腐蚀速率增加1％，则极限承载力试验值将降低1.849 kN。本文提出的数值分析方法是可行的，所建议的钢筋混凝土梁极限承载力计算方法具有较高的精度。如果腐蚀速率增加1％，极限承载力试验值将减少1.002 kN。当剪切跨度比为2.4时，如果腐蚀速率增加1％，则极限承载力试验值将降低1.849 kN。本文提出的数值分析方法是可行的，所建议的钢筋混凝土梁极限承载力计算方法具有较高的精度。如果腐蚀速率增加1％，极限承载力试验值将减少1.002 kN。当剪切跨度比为2.4时，如果腐蚀速率增加1％，则极限承载力试验值将降低1.849 kN。本文提出的数值分析方法是可行的，所建议的钢筋混凝土梁极限承载力计算方法具有较高的精度。