近海大气环境下RC结构钢筋锈蚀程度预测

钢筋锈蚀是影响近海大气环境下RC结构使用寿命的重要因素之一。为研究近海大气环境下混凝土碳化与氯离子侵蚀双重作用对钢筋锈蚀的影响，对沿海地区不同龄期钢筋混凝土结构进行了工程实测，包括混凝土抗压强度、碳化深度、钢筋表面氯离子浓度及锈蚀深度。基于实测结果，拟合得到了混凝土碳化深度与抗压强度间的关系模型，建立了同时考虑混凝土碳化深度与钢筋表面氯离子浓度的钢筋锈蚀深度预测模型。在此基础上，利用Abaqus分析软件对不同龄期、轴压比的RC框架柱进行了损伤塑性分析，得到了锈蚀RC框架柱抗震性能随服役龄期与轴压比的变化规律。

Corrosion prediction of reinforced concrete structure in marine atmospheres

Reinforcement corrosion is an important factor influencing the service life of reinforced concrete structures in offshore atmospheric environment. To study the effects of concrete carbonation and chloride corrosion on reinforcement corrosion in offshore atmospheres, an engineering measurement of reinforced concrete structures with varying ages was conducted. This assessment included measurements of compressive strength, carbonation depth of concrete, surface chloride concentration, and corrosion depth of steel. Utilizing the obtained measurements and prior research findings, a relationship model between concrete carbonation depth and compressive strength was developed. Additionally, a prediction model for reinforcement corrosion depth was established, taking into account both concrete carbonation depth and the surface chloride concentration of reinforcement. Building upon these models, a damage plastic analysis of reinforced concrete frame columns with different ages and axial compression ratios was performed using Abaqus analysis software, revealing the seismic performance variation of corroded reinforced concrete frame columns concerning service age and axial compression ratio.