用快速锈蚀实验的方法研究了混凝土试件在出现顺筋裂缝时刻的钢筋锈蚀率与钢筋直径、混凝土等级与保护层厚度之间的定量关系 ,并通过有限元分析计算得到了锈胀裂缝扩展到保护层表面时的锈胀力 ,提出了混凝土保护层胀裂时刻的钢筋锈胀力的力学模型 ,这将对钢筋混凝土结构的耐久性分析与设计是大有裨益的 The rapid corrosion experiment was used to study the quantitative relationship between the corrosion rate of steel bars and the diameter of steel bar, the concrete grade and the thickness of the protective layer at the moment when the tendon crack occurred. The expansion of the corrosion crack was extended to Corrosion force at the surface of the protective layer is put forward. The mechanical model of the corroded force of the rebar at the moment when the protective layer of concrete is cracked is proposed, which is of great benefit to the durability analysis and design of the reinforced concrete structure