Techno Press

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

Abstract     [Full Text]
    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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