摘要
混凝土结构、构件为有限空间介质,其内部电场很难套用半空间或全空间的边值问题进行分析,给出解析解。为探究混凝土内部有限空间电场分布规律,分别采用物理模型试验、镜像法和数值模拟的方法进行研究。首先通过标本架法观测混凝土试件的电阻率作为混凝土正常电阻率值;分别利用镜像法、物理模型试验和有限单元法模拟计算、混凝土有限空间的电场分布,求取有限空间电阻率。三者相互对比验证的结果表明,采用镜像法计算有限空间的电场分布正确可行,受边界条件的影响,有限体表面观测的电位差、视电阻率与供电和观测电极位置关系密切,直接观测的视电阻率不能视为有限体的电性参数。
Concrete structures and components are finite space media,so it is difficult to apply half space or full space boundary value problems to analyze the internal electric field,and provide analytical solutions as well.In order to explore the distribution law of electric field in the limited space of concrete,physical model test,mirror image method and numerical simulation method are used respectively.Firstly,the resistivity of the concrete specimen is observed by the specimen rack method as the normal value of the concrete resistivity.Secondly,the image method,physical model test and finite element method are then used to simulate and calculate the electric field distribution of the concrete finite space respectively,and the resistivity of the finite space is calculated.Thirdly the results of the three comparative verification show that the image method is correct and feasible to calculate the electric field distribution of the finite space,and the receiving edge is correct and feasible.Under the influence of boundary conditions,the potential difference and apparent resistivity observed on the surface of the finite body are closely related to the power supply and the position of the observation electrode.The apparent resistivity observed directly cannot be regarded as the electrical parameters of the finite body.
作者
黄俊革
漆玉茂
刘宇
张彧
卢思同
HUANG Junge;QI Yumao;LIU Yu;ZHANG Yu;LU Sitong(School of urban construction and safety engineering,Shanghai Institute of Technology, Shanghai 201418, China)
出处
《物探化探计算技术》
CAS
2021年第1期62-69,共8页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家自然科学基金项目(41564005)。
关键词
有限空间
电场分布
镜像法
有限单元法
finite space
electric field distribution
image method
finite element method
