中文摘要：

大量锈蚀钢筋混凝土偏压构件的实验研究表明,随着纵向受力主筋锈蚀率的增大,偏心受压构件的承载力及其刚度均有不同程度的降低。并且由于钢筋锈蚀,钢筋混凝土偏心受压构件延性也随之降低,脆性性质明显,从而可能使得钢筋混凝土偏压构件的破坏形态发生变化。在对预制钢筋混凝土柱进行快速锈蚀实验85研究的基础上,对锈蚀偏心受压构件的结构性能退化机理和破坏特征进行了分析;在现行计算理论和实验85结果分析的基础上,通过拟合出的锈蚀钢筋与混凝土间的应变不协调系数,对未锈蚀构件的相对界限受压区高度进行修正,得到了锈蚀偏心受压构件相对界限受压区高度的修正公式;考虑锈蚀钢筋截面的削弱、钢筋屈服强度的降低以及钢筋和混凝土之间粘结性能退化的影响,提出锈蚀偏心受压构件正截面承载力计算方法,为今后混凝土结构耐久性评估和可靠性鉴定提供了科学依据。

英文摘要：

Extensive existing experimental results about eccentrically compressed components made of corroded reinforced concrete show that the bearing capacity and stiffness of eccentrically compressed components reduce to different degrees along with the corrosion rate of longitudinal tensile bars increasing. Moreover,ductility of reinforced concrete with eccentrically compressed components reduces due to the reinforcing steel bar corrosion,then component＇s brittle behavior emerges clearly,and failure mode of reinforced concrete with eccentrically compressed components may change. Study of the mechanism of structural behavior deterioration and failure characteristics of corroded reinforced concrete with eccentrically compressed components was carried out based on experimental results about an accelerated corrosion test of longitudinal tensile in prefabricated reinforced concrete columns. Relative boundary compressive region＇s height of non corroded component was corrected through fitting coefficient of strain incompatibility and calculation formula for relative boundary compressive region＇s height of corroded component was obtained based on existing calculation theory and test result analysis. Taking into account the weakening of cross section and the yield strength of corroded reinforcing steel bar and bonding capacity deterioration,a calculation method for normal section bearing capacity of corroded RC components is obtained. It may provide a scientific basis for durability and reliability evaluation of RC structure.