基于气候环境作用的混凝土材料与结构使用寿命预测方法
Method for Predicting Service Life of Concrete Materials and ？？Structures Based on Climate Environmental Action

为了提升自然气候环境下钢筋混凝土结构使用寿命的预测精度，以混凝土受氯盐侵蚀为背景，分析了钢筋混凝土结构使用寿命的全过程，并给出各关键阶段使用寿命的计算模型；基于气候环境作用谱、混凝土微环境响应谱以及钢筋锈蚀速率时变模型的相关研究成果，提出新建混凝土结构耐久性设计的使用寿命预测方法，并给出算例说明；基于混凝土内钢筋锈蚀量的等效，提出混凝土材料与结构耐久性试验中的加速老化因子概念，并提出了基于人工气候环境耐久性试验的使用寿命预测方法。结果表明：该方法可以提高新建混凝土结构使用寿命的预测精度，并且使人工气候环境耐久性试验的设计更具有针对性。
In order to improve the accuracy of predicting the service life of concrete materials and structures, the whole process of service life of reinforced concrete (RC) structures in chloride environment was analyzed. Calculation models of service life in different key stages for the whole process were given respectively. Based on the action spectrum of climate environment, response spectrum of micro？？environment in concrete and the time？？varying model of the steel bar corrosion rate, the method for predicting the service life of new RC structures were proposed and an example was given to illustrate. According to the equality of the corrosion amounts of steel bar in different environment conditions, the concept of accelerated aging factor in concrete materials and structural durability test was proposed. Based on the durability test in artificial climate environment, the method for predicting the service life was put forward. The results show that the method proposed can improve the accuracy of predieting the service life of new concrete structures and make the design of durability test in the artificial climate environment more targeted.？