【摘要】 采用人工模拟环境、通电法和电渗法侵蚀方式对钢筋混凝土梁进行了受力性能退化试验研究。通过对比分析,研究了侵蚀方式对钢筋混凝土梁承载力、钢筋力学性能及其混凝土内氯离子分布特征等的影响。试验结果表明:钢筋混凝土梁的荷载-挠度曲线符合指数函数形式;不同侵蚀方式对钢筋混凝土梁挠度值、混凝土内氯离子含量分布、钢筋强度及其锈蚀产物的影响存在差异;采用电渗法与人工模拟环境侵蚀方式下的钢筋混凝土梁承载力、钢筋力学性能及其混凝土内氯离子分布相似,而有别于通电锈蚀方式。此外,通电锈蚀方式下混凝土内氯离子分布呈现出混凝土表层含量较多,其内部一定区域氯离子含量为定值且在钢筋附近迅速降低特征。更多还原

【Abstract】 In this study,the effect of different corrosion methods such as artificially simulated environment,electrifying corrosion and electroosmosis on the performance deterioration of the reinforced concrete beam was investigated.By comparison the characteristic of the deterioration,the influence of the bearing capacity,mechanical properties and the distribution of the chloride in concrete were investigated.The results indicate that the bearing capacity and deflection of the reinforced concrete beams can be expressed by exponential function.Different corrosion methods have different effects on the deflection of reinforced concrete beams,content distribution of chloride ions in concrete,strength of the corroded steel and its corrosion product.Different from the electrifying corrosion,the bearing capacity of the reinforced concrete beams,mechanical properties of the steels and the distribution of the chloride in concrete corroded by electroosmosis method were similar to those of artificial simulated environment.In addition,the chloride distribution of reinforced concrete beam corroded by electrifying corrosion method shows that the chloride content on concrete surface is more,and tends to be constant beyond a certain depth;finally,it drops rapidly near the rebar.更多还原