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为了研究交变荷载对硫酸盐侵蚀混凝土腐蚀速率的影响,基于单一硫酸盐侵蚀混凝土扩散系数的计算模型,通过扩散途径划分、裂纹均一化等处理,引入裂纹因子的概念,推导出表征交变荷载对硫酸盐侵蚀混凝土扩散系数影响的有效扩散系数Dt计算公式,并采用有限差分法,利用Matlab软件通过求解硫酸盐侵蚀混凝土过程中的非稳态扩散反应方程,求解出有效扩散系数Dt,有效扩散系数Dt有效地表征了交变荷载对硫酸盐侵蚀混凝土扩散系数的影响。
In order to study the effect of alternating load on the corrosion rate of sulfate attacked concrete, based on the calculation model of diffusion coefficient of single sulfate attack concrete, the concept of crack factor was introduced by means of diffusion route division and crack homogenization, Calculate the effective diffusion coefficient Dt which affects the diffusion coefficient of sulphate erosion concrete and use the finite difference method to solve the unsteady diffusion reaction equation in sulfate erosion concrete by using Matlab software to solve the effective diffusion coefficient Dt and effectively diffuse The coefficient Dt effectively characterizes the effect of alternating load on the diffusion coefficient of sulphate-eroded concrete.