关键词: 石墨, 混凝土, 电导率, 割线模量, 数值模拟

Abstract: An analogue between mechanical and electrical fields of conductible graphite concrete was done through numerical simulation to investigate the whole failure process of uniaxial compression members by use of the numerical code software MFPA (material failure process analysis). The concrete is regarded as a composite material made from cement mortar matrix and coarse aggregate. The whole process simulated includes the loading conditions and deformation of members, formation/propagation of their internal cracks and how they finally come to failure, from which the mechanical field of uniaxial compression model of graphite concrete is worked out with the same size of real concrete members. Then, the analogous relationship between mechanical and electrical quantities is obtained according to the curves of measured secant modulus-strain and conductivity-strain, thus converting the mechanical field into electrical field. It is a new way to get the electrical relationship of conductible concrete and will provide a new approach to safety monitoring for structures.