【摘要】 为探究干湿交替作用对钢筋混凝土结构中氯离子传输规律的影响。考虑钢筋的阻挡作用，建立干湿交替作用下钢筋混凝土结构的氯离子对流传输模型，通过试验验证该模型的适用性，并基于二维细观混凝土模型进行参数分析。研究结果表明：钢筋的阻挡作用会导致氯离子在混凝土表面积聚，且这种现象随着干湿交替时间的增加而加剧。在细观模型中，随着氯离子在混凝土中的积累，氯离子含量的峰值和位置均出现在表层。与普通混凝土相比，钢筋混凝土结构的氯离子含量较高。氯离子含量与钢筋直径的增加呈正相关。干湿时间比的增加，加速了氯离子在混凝土内的传输，初始溶液饱和度越低，氯离子含量越高，且初始饱和度为0.1时，氯离子含量峰值达到0.605%。更多还原

【Abstract】 In order to obtain the chloride ion transport law in reinforced concrete structures under dry and wet alternating effects. Considering the blocking effect of steel reinforcement, a model of chloride ion convective transport in reinforced concrete structures under dry-wet alternation is established, the applicability of the model is verified through experiments, and the parameters are analyzed based on two-dimensional meso-concrete model. The results show that the blocking effect of steel reinforcement causes chloride ions to accumulate on the surface of concrete and increase with the increase of dry-wet alternation time. In the mesoscopic model, with the accumulation of chloride ions in concrete, the peak value and location of chloride ion content appear in the surface layer. The chloride ion content was larger in reinforced concrete structures compared to plain concrete, and the chloride ion content was positively correlated with the increase in reinforcement diameter. The increase in the dry-to-wet time ratio accelerated the transport of chloride ions within the concrete, and the lower the initial solution saturation is, the higher the chloride ion content is, When the initial saturation is 0.1, the peak chloride ion content is 0.605%.更多还原