电化学沉积修复过程混凝土超声波速度演化不确定性表征
Uncertainty Characterization of Ultrasonic Velocity Evolution in Concrete Repaired by Electrochemical Deposition
DOI: 10.12677/HJCE.2019.83069, PDF,   
作者: 丁剑敏, 刘文军：无锡地铁集团有限公司，江苏 无锡；万 凯：中铁一局集团城市轨道交通工程有限公司，江苏 无锡；朱志远：同济大学土木工程材料系，上海
关键词: 电化学沉积；混凝土修复；超声测量；Gauss分布；拟合度；Electrochemical Deposition； Concrete Repair； Ultrasonic Measurement； Gauss Distribution； Degree of Fit
摘要: 电化学沉积修复过程影响因素多，同一批试件的修复效果呈现出波动性特征。本文采用多孔混凝土试件模拟损伤试件开展了电化学沉积修复试验，用超声波速度等手段表征其修复效果，分别使用Gauss分布、Lognormal分布以及Lorentz分布拟合修复过程整体超声波概率演化特征，采用贝叶斯信息准则(BIC准则)与拟合优度可决系数(R2)来评价对应拟合度，结果显示，随着修复过程推进，试件整体超声波速度有增长趋势，但是，同一批试件，在相同的电化学环境设置下，修复效果(超声波速度)呈现随机性特征；拟合度评价显示，对比Lognormal分布以及Lorentz分布，采用Gauss分布更符合修复过程混凝土超声波不确定性的概率表征。
Abstract: The process of electrochemical deposition restoration is influenced by many factors and even the restoration effect of the same batch of specimens presents a fluctuating feature. In this paper, the porous concrete specimens were used to simulate the damage specimen during the process of electrochemical deposition and the ultrasonic velocity was used to characterize the restoration effect. Gauss distribution, Lognormal distribution and Lorentz distribution were used to fit the evolution of the overall ultrasonic velocity and Bayesian Information Criterion (BIC criterion) and goodness of fit determination coefficient (R2) were used to evaluate the corresponding goodness of fit. The results showed that the overall ultrasonic velocity of the specimens increased with the progress of the restoration process, but the restoration effect (ultrasonic velocity) of the same batch of specimens presented random characteristics under the same electrochemical environment setting. The fitting degree evaluation showed that compared with the Lognormal distribution and Lorentz distribution, the Gauss distribution was more consistent with the probabilistic characterization of the ultrasonic uncertainty of concrete in the repair process.
文章引用：丁剑敏, 刘文军, 万凯, 朱志远. 电化学沉积修复过程混凝土超声波速度演化不确定性表征[J]. 土木工程, 2019, 8(3): 587-595. https://doi.org/10.12677/HJCE.2019.83069

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