基于半椭圆锈蚀模型的混凝土保护层锈胀开裂分析

钢筋锈蚀时锈蚀层的分布规律会因钢筋所处的位置不同具有差异性,为了分析非均匀锈蚀层分布的差异对混凝土保护层开裂的影响,基于钢筋锈蚀层半椭圆分布模型,对钢筋非均匀锈蚀情况下的混凝土保护层开裂过程进行了有限元分析,并与均匀锈蚀假定下的保护层开裂理论进行了对比.研究显示按照均匀锈蚀假定的计算结果与非均匀锈蚀假定具有较大误差,尤其是在边角区误差更为明显,考虑钢筋锈蚀的非均匀性更加符合实际.对影响保护层锈胀开裂的因素进行分析后发现,钢筋直径和保护层厚度对保护层锈胀开裂的影响较大,混凝土抗拉强度对保护层锈胀开裂的影响较小.

Analysis of Protective Layer Corrosive Cracking Based on Rust Layer Half Elliptical Distribution

The difference of reinforced location makes the rust layer distribution different.In order to study the effect of non-uniform corrosion cracking in the corrosive,make a study of protective layer non-uniform corrosive cracking based on half elliptical rust layer distribution,and contrast the results to uniform corrosion.The analysis showed that the results between uniform corrosive cracking anf non-uniform corrosive cracking is different,especially in the angle area,considering the inhomogeneity of reinforcement corrosion is more practical.After the analysis of factors affecting corrosive cracking,founded that protective layer thickness and steel diameter is more influential than tensile strength of concrete.