东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2005, Vol. 26 ›› Issue (5): 492-495.DOI: -

• 论著 • 上一篇    下一篇

石墨混凝土应变与电导率关系的理论分析

吴献;吴勃;田军;唐春安   

  1. 东北大学资源与土木工程学院;北京住宅建设总公司房地产开发公司;东北大学资源与土木工程学院;东北大学资源与土木工程学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2005-05-15 发布日期:2013-06-24
  • 通讯作者: Wu, X.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50174013)

Theoretical analysis of relation between strain and electrical conductivity of graphite concrete

Wu, Xian (1); Wu, Bo (2); Tian, Jun (1); Tang, Chun-An (1)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China; (2) Real Estate Development Co., Beijing Residential Construction General Co., Beijing 100020, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2005-05-15 Published:2013-06-24
  • Contact: Wu, X.
  • About author:-
  • Supported by:
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摘要： 从导电机理、比拟法及损伤三方面探讨了石墨混凝土棱柱体试件轴心受压全过程试验·分析了实测的混凝土试件变形模量应变关系上升及下降的走势与电导率应变关系走势相一致的原因·在有损伤的情况下,由于力场与电场均符合拉普拉斯方程,试件力场与电场的边界条件也一致,所以在石墨混凝土试件受荷全过程中电场力场可以相互比拟,即试验验证了比拟法的正确性·电导率这个材料的本征量与变形模量一样,可以很好地反映材料的损伤状况及破坏过程·

关键词: 电导率, 比拟, 应变, 变形模量, 混凝土, 损伤

Abstract: Discusses the conduction mechanism of prism-shaped graphite concrete in view of the whole process of an axial loading test, as well as the method of analogy and damage to the concrete. Analyzes the reasons why the up-and-down trend as shown on the deformation modulus-strain relation curve conforms to that as shown on the conductivity-strain curve. In case a specimen is damaged, its electric field and force field both comply with Laplace equation, and their boundary conditions are also in accord with each other. It means that it is possible to draw an analogy between the two fields in the whole loading test process of the graphite concrete samples, i.e., the correctness of such an analogy is verified by the test. Like the deformation modulus, the electrical conductivity is such an eigenvalue of a material that will characterize well the damage and rupture process.

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