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模拟腐蚀层扰动的硫酸腐蚀环境对6组混凝土圆柱体试件进行了加速腐蚀试验,采用三维激光扫描法和传统的游标卡尺法分别对试件的硫酸腐蚀深度进行测量.以最小二乘圆柱法构造目标函数,利用Matlab软件对三维激光扫描法获得的数据进行处理,求得每个被测点的腐蚀深度,对腐蚀深度进行统计分析,发现其服从正态分布,统计参数均值和标准差均随腐蚀时间近似线性增大,腐蚀深度可表示为高斯随机过程.与三维激光扫描法结果相比,游标卡尺法所得腐蚀深度的均值略小,标准差则明显偏小.由于三维激光扫描法获得的数据量是游标卡尺法的数万倍,因此基于三维激光扫描法的混凝土腐蚀深度随机过程模型在进行腐蚀深度预测时具有更好的可信性.
The corrosive environment was simulated to simulate the corrosive environment of sulfuric acid corrosion of six groups of concrete cylinder specimens were accelerated corrosion test, the use of three-dimensional laser scanning method and the traditional vernier caliper method to measure the depth of sulfuric acid corrosion test specimens. Constructed by the least square cylinder method Objective function, the data obtained by 3D laser scanning method were processed by Matlab software, the corrosion depth of each measured point was calculated, the corrosion depth was statistically analyzed and found to follow the normal distribution, the mean and standard deviation of statistical parameters were The corrosion time increases linearly and the corrosion depth can be expressed as a Gaussian random process.Compared with the results of 3D laser scanning, the mean value of the depth of corrosion obtained by the vernier caliper method is slightly smaller and the standard deviation is obviously smaller.Due to the data obtained by 3D laser scanning The amount is tens of thousands of times the vernier caliper method. Therefore, the stochastic model of concrete corrosion depth based on 3D laser scanning has better credibility in predicting the depth of corrosion.