Structural Engineering and Mechanics

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Numerical study on the influence of mesomechanical properties on macroscopic fracture of concrete

  • Zhu, W.C. (Laboratory of Numerical Test on Material Failure, School of Resource and Civil Engineering, Northeastern University) ;
  • Tang, C.A. (Laboratory of Numerical Test on Material Failure, School of Resource and Civil Engineering, Northeastern University) ;
  • Wang, S.Y. (Laboratory of Numerical Test on Material Failure, School of Resource and Civil Engineering, Northeastern University)
  • Received : 2004.03.24
  • Accepted : 2004.12.28
  • Published : 2005.03.30
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Abstract

The numerical simulations on the influence of mesoscopic structures on the macroscopic strength and fracture characteristics are carried out based on that the concrete is assumed to be a three-phase composite composed of matrix (mortar), aggregate and bond between them by using a numerical code named MFPA. The finite element program is employed as the basic stress analysis tool when the elastic damage mechanics is used to describe the constitutive law of meso-level element and the maximum tensile strain criterion and Mohr-Coulomb criterion are utilized as damage threshold. It can be found from the numerical results that the bond between matrix and aggregate has a significant effect on the macroscopic mechanical performance of concrete.

Keywords

References

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