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Structural Engineering and Mechanics
  Volume 19, Number 5, March30 2005 , pages 519-533

Numerical study on the influence of mesomechanical properties on macroscopic fracture of concrete
W. C. Zhu, C. A. Tang and S. Y. Wang

    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.
Key Words
    concrete; mesoscopic; fracture process; numerical simulation.
Laboratory of Numerical Test on Material Failure, School of Resource and Civil Engineering, Box 138, Northeastern University, Shenyang 110004, China

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