港口水工建筑物中氯离子分布规律的研究

Study on Distribution Law of Chloride Ions in Hydraulic Structures

锈蚀破损为港工混凝土钢筋建筑物破损的主要形式,它严重影响着港工混凝土钢筋建筑物的耐久性。根据文中复合数学模型,表层混凝土的氯离子含量可以用毛细吸收的有关经验公式进行计算,表层以里混凝土的氯离子含量可以用菲克扩散方程求解。用氯离子在混凝土内分布的复合数学模型对天津港有关高桩码头的梁、板氯离子含量进行计算,计算结果与实测值较吻合。

Corrosion damage is the main damage form in reinforced concrete stuctures in harbor engineering.It has a strong impact on the durability of the structures.The 'capillary suction-diffusion' numerical model is presented.Based on this model,chloride ions content in concrete can be calculated.Chloride ions content in surface concrete can be calculated by capillary suction experiential formula and that in the internal concrete can be obtained by Fick diffusion equation.Chloride ions content in concrete beams and slabs in Tianjin Port derived from this numerical model is consistent with the measured value in the field.