[1]艾亿谋,杜成斌,居发亮.基于电阻率的混凝土裂缝测量方法[J].东南大学学报(自然科学版),2008,38(2):289-292.[doi:10.3969/j.issn.1001-0505.2008.02.021]
 Ai Yimou,Du Chengbin,Ju Faliang.Concrete crack measurement by electrical resistivity[J].Journal of Southeast University (Natural Science Edition),2008,38(2):289-292.[doi:10.3969/j.issn.1001-0505.2008.02.021]
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基于电阻率的混凝土裂缝测量方法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
38
期数:
2008年第2期
页码:
289-292
栏目:
土木工程
出版日期:
2008-03-20

文章信息/Info

Title:
Concrete crack measurement by electrical resistivity
作者:
艾亿谋1 杜成斌1 居发亮2
1 河海大学土木工程学院, 南京 210098; 2 西安交通大学材料科学与工程学院, 西安 710049
Author(s):
Ai Yimou1 Du Chengbin1 Ju Faliang2
1 College of Civil Engineering, Hohai University, Nanjing 210098, China
2 College of Material Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
关键词:
电阻率测量技术 表观电阻率 裂缝深度 裂缝密实度 混凝土结构 数值模拟
Keywords:
electrical resistivity measuring technique apparent resistivity crack depth crack bridge density concrete structure numerical simulation
分类号:
TU18
DOI:
10.3969/j.issn.1001-0505.2008.02.021
摘要:
基于四探针电阻率测量技术,依据试验测得的混凝土表观电阻率变化确定裂缝位置.在考虑到干燥环境、潮湿环境和输入电流方向对裂缝导电能力影响的前提下,采用数值模拟技术探讨了表观电阻率随裂缝深度的变化规律,并将实际裂缝简化为等效裂缝,进而提出裂缝等效电路和等效电阻的方法,研究了表观电阻率与裂缝密实度的关系.结果表明,依据电阻率测量方法可以准确地找出裂缝位置,裂缝深度和密实度与表观电阻率变化有较好的相关性; 在干燥环境下,输入电流方向垂直于裂缝时表观电阻率随着裂缝深度或裂缝等效电阻率的增加而增大,输入电流方向平行于裂缝时表观电阻率随裂缝深度或裂缝等效电阻率的增加而减小; 在潮湿环境下,输入电流方向垂直于裂缝时表观电阻率不随裂缝深度或裂缝等效电阻率的变化而改变,输入电流方向平行于裂缝时表观电阻率随裂缝深度或裂缝等效电阻率的增加而减小.
Abstract:
The location of the crack can be found by the change of the apparent resistivity, based on four-probe electrical resistivity measuring technique. Considering the influence of the environment and the direction of electrical current on the conductive capacity of crack, the change of apparent resistivity with crack depth was obtained by numerical simulation method. Crack equivalent circuit and resistance method is proposed to study the relationship between the apparent resistivity and the crack bridge density, by simplifying the actual crack into equivalent one. The results indicate that the location of the crack can be precisely found by electrical resistivity measuring technique, and there is a preferable correlation between the change of the apparent resistivity and the crack’s depth and bridge density. In dry environment, when the direction of electrical current is perpendicular to the crack, the apparent resistivity value increases with the increase of crack depth or crack equivalent resistivity, when the direction of electrical current is parallel to the crack, the apparent resistivity value decreases with the increase of crack depth or crack equivalent resistivity. In moist environment, when the direction of electrical current is perpendicular to the crack, the apparent resistivity value doesn’t change with crack depth or crack equivalent resistivity, when the direction of electrical current is parallel to the crack, the apparent resistivity value decreases with the increase of crack depth or crack equivalent resistivity.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 艾亿谋(1983—),男,博士生; 杜成斌(联系人),男,博士,教授,博士生导师,cbdu@hhu.edu.cn.
基金项目: 国家自然科学基金资助项目(50779011).
引文格式: 艾亿谋,杜成斌,居发亮.基于电阻率的混凝土裂缝测量方法[J].东南大学学报:自然科学版,2008,38(2):289-292.
更新日期/Last Update: 2008-03-20