沿海在役钢筋混凝土桥梁的钢筋锈蚀模型

Steel corrosion model of in-service RC bridge near coastal areas

摘要:

为了更合理地确定在役钢筋混凝土桥梁的钢筋锈蚀模型,在综合国内外已有的钢筋锈蚀模型的基础上,进行了分类比较分析．提出了考虑荷载影响和氯离子结合能力的钢筋锈蚀模型,并以沿海地区钢筋混凝土桥梁为背景,验证了该锈蚀模型的可行性．研究表明:考虑荷载影响和氯离子结合能力的钢筋锈蚀模型更加趋于合理,采用这种钢筋锈蚀模型进行结构使用性能退化的模拟及结构使用寿命的预测将更有工程实践意义．

Abstract:

To determine the steel corrosion model of in-service reinforced concrete (RC) bridge more reasonably, the existing research literatures on steel corrosion were reviewed and compared and a revised steel corrosion model by considering the load effect and chlorine ion combining ability was developed. The model was used in study of in-service reinforced concrete bridge near coastal areas, and its validity was verified. The result shows that the model is more reasonable when compared with the traditional chloride diffusion models. It is practical to adopt the model for simulating materials deterioration and predicting structural service life.