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氯离子渗透是导致钢筋混凝土结构耐久性能退化的重要原因之一。荷载作用会对混凝土的孔隙和裂缝产生影响,改变混凝土抗氯离子侵蚀的能力,加速混凝土结构的耐久性退化。目前对静力荷载作用下氯离子在混凝土中的扩散行为开展了一定研究,但对疲劳荷载下混凝土中氯离子的渗透性能研究较少。该文总结了近年来国内外文献报道中关于疲劳荷载作用下氯离子在混凝土中传输行为的研究成果,包括试验方法、扩散行为、扩散机理、影响因素以及扩散模型等,并对现阶段研究工作存在的不足提出了建议。
Chloride ion penetration is one of the important reasons leading to the degradation of durability of reinforced concrete structures. Load effect will have an impact on concrete pores and cracks, change the ability of concrete resistance to chloride ions to accelerate the durability of concrete structures degradation. At present, some studies have been carried out on the diffusion behavior of chloride ion in concrete under the action of static load. However, there is little research on the chloride ion permeability of concrete under fatigue load. This paper summarizes the research results of chloride ion transport behavior in concrete, including test methods, diffusion behavior, diffusion mechanism, influencing factors and diffusion models in domestic and foreign literature reports in recent years. At the same time, The existing problems make suggestions.